How to Keep Mice Out of Your House 🐭

Put your mothballs and steel wool away.  They don't deter mice, no matter what you've read on the Internet. Here I lay out what you really need to do to keep mice out of your house and how to get rid of them if they're already in there.

I speak from experience.  

They've always arrived without invitation roaming around as if they pay the mortgage, eating stuff I leave on the counter, going to the bathroom behind the stove.   I've spent a lot of time researching how to get rid of my family members but neither poison, bait or traps work.  They keep showing up.

Mice? Now, those I know how to get rid of. 

I also know how to get rid of flies outside using this simple bottle trap and the best fly bait.

If you have mice in your house you're not gross, or dirty or living in a hovel - you just aren't as smart as a mouse.

The BEST way to deal with mice is to not allow them in in the first place. They start looking for a cozy indoor home when nighttime temperatures start to dip in the fall so you need to get your house prepared by late summer.

Quick Steps to Keep Mice Out of the House

• Seal cracks and holes with hardware cloth + spray foam
• Check vents, pipes, and foundations for gaps
• Store food in sealed containers
• Keep your yard free of clutter
• Use traps inside if mice get in
  This structure makes it easier for Google to pull as a snippet.

Full Instructions

The best thing you can do to get rid of mice is to not let them in your house in the first place. Duh. 

Let me say you're probably  never going to make your house 100% mouse proof, but you can at least make it a challenge for them to get in.  

For instance I found a big crack under the parging of my house beside a window. It was big enough that a pig could squeeze in, let alone a mouse.

To keep mice out you need to go around the house looking for holes and cracks. And then ... you need to FILL THEM PROPERLY.

Mice can chew through concrete if they want to so steel wool is like a palate cleanser to them. It won't even faze them.

Find Mouse Entry Points

Mice can enter your home through a hole smaller than a dime.

Rats can enter your home through a hole the size of a quarter.

1. Check the foundation for cracks.
2. Rodents are greasy and when they squeeze into holes over and over they leave a dark mark around the hole or crack. Watch for that.
3. Mouse poop around the windows and doors.
4. Check for spaces around pipes and wires that enter your home.
5. Stove and air conditioning vents both off the side of the house and the roof are often entry points for rodents.
6. If you hear running around in your attic, chances are the nice are coming from somewhere on the roof. Check it.
7. Look for gnaw marks. Both mice and rats will chew through wood to gain access to your house. Because they're complete a$$heads.
8. Urine stains. Mice pee ALL the time and leave a trail. These pee stains can be seen with a black light. Buy a strong blacklight (UV) flashlight, turn the lights off and get ready to be horrified. Finding where the pee leads to can help you find where mice are coming in.

To Fill Foundation Cracks

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How small of a hole can a mouse get through?  If you can stick a pencil into it, a mouse can get into it too.

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Here's what you need to do. 

1. Push a piece of metal (rod or crumpled wire) into smaller holes and then fill them with expandable spray foam like Great Stuff.
2. Fill larger cracks with ¼" hardware cloth and then use the spray foam.

Handy Tip:  Use gloves that are slightly more resilient than latex gloves. 

3. After filling the crack with hardware cloth and spray foam, cut the excess foam off with a sharp knife when it's dried.

4. Do the same around pipes and cables.

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Keep your yard clean. Remove any garbage, leaves or clutter especially around your foundation. Just doing this - making your yard less habitable for mice - will go a long way to keeping them out of your home.

How to Get Rid of Mice

If you already have mice in the house you're going to have to deal with them.

1. Poison
2. Traps
3. A Cat

• Poison is effective but it's also a slow, painful death for the animal.  Plus there's a danger if you use open poison and have kids or pets in your house. Kids won't eat broccoli but they'll sure as shit eat mouse poison if you leave it out.  I personally once drank an entire bottle of motor oil when I was a a kid. Yup.

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What if your pet eats a poisoned mouse?  The chances are low but know that your pet could become poisoned after eating a poisoned mouse.  Mice can only eat a few grams of poison a day. Even if your pet ate the entire poisoned mouse it still wouldn't be enough to poison even the smallest dog.  Around 56 grams of poison would need to be consumed by a very small dog to poison it.

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**secondary poisoning like this is more common if you have barn cats that have to actually hunt for their food and might eat several mice in a day.  House cats prefer to get their food in a bowl.**

• Traps are your best choice for eliminating mice that are in your house. You just have to decide which type of trap to use. 

• Getting a cat REALLY will help your mouse problem. It will scare them from coming into your house, plus cats are natural mousers. A lot of dogs are as well.

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Best Mouse Traps for Getting Rid of Mice

1. ELECTRONIC MOUSE TRAPS

   **Best Choice**
   These Viktor electronic mouse traps are my favourite.  They electrocute the mouse instantly and there is a 0% chance that it will only be maimed or hurt.  Of all the kill traps, these are the most humane.

2. CLASSIC SNAP TRAP

   **Best Choice**
   If you don't want to put out the money for an electronic mouse trap, your next best bet is the classic, wood snap trap.  They work better than anything else but they're also the most difficult to set and use.  Don't worry about it though, I'm going to show you how to properly set a mouse trap.
    

3. PLASTIC SNAP TRAPS

   There are a few different new fangled plastic snap traps on the market.  They're easier to set but I have found them less effective.

4. LIVE TRAPS
   
   Live traps like this are little Hotel Californias. The mouse goes in but it can't get out. They work, but require more commitment from you. Check traps often and road trip any you catch at least a mile from your house.

5. GLUE TRAPS

6. **Worst Choice**
   Avoid these at all costs. They're gross, sticky, messy and completely inhumane. These pads covered in ultra sticky glue trap render the mouse immobile until it either dies of thirst and starvation or until they struggle to get away, breaking their little feet or legs off. They're awful inventions.

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So now you know that if you have mice you're going to need to either put down a contained bait station, or set a mouse trap. 

What Bait to Use

Electronic traps work well with a bit of peanut butter smeared onto the back of it. Around the size of a pea is all you need.

Snap traps can take a multitude of baits. In order of effectiveness:

1. A peanut wedged in the bait holder so the mouse has to work to get it out.
2. A dried kernel of corn wedged into the bait holder. Put a dab of peanut butter on it too.
3. Peanut Butter
4. Jam
5. Deli meat
6. Soft stinky cheese - blue cheese for instance

How to Set a Mouse Trap

 

1. Wear latex gloves when handling mouse traps and food to keep human scent off of them.
2. Slightly bend the hook on the bait holder that holds the pin so it just barely holds the pin in place without setting off the trap. Be CAREFUL and keep your fingers out of the way. Doing this to your trap will give it a hair trigger to better catch mice. And fingers.
3. Bait the trap with a *small* amount of bait. No food bigger than pea sized. The best bait is half of a peanut or a kernel of corn wedged under the teeth of the bait holder. Peanut butter can be your 3rd choice but the others are better because the mouse can't just lick it off and run away. With corn or a peanut they have to work on pulling it out which is more likely to set off the trap.
4. Mice run along backs of cupboards and walls because it's dark and they feel safe there. Place the trap with the baited end against a wall so the mouse can only get at it from the left or right as it runs along the wall. This helps make sure the mouse is killed instantly because it's coming at the trap from the ideal direction.
5. Put out a LOT of traps. Not just one or two. Put them everywhere you see mouse poop but away from where pets and kids can get at them.

Video of Setting a Mouse Trap

Are Mice Dangerous?

Yep. 

Mice like chewing on things: wood, wires, food, cushions, heirloom vegetable seeds lovingly gathered and carefully stored in paper envelopes for future generations to come.  Also noses.  I have no actual proof but if presented with a nose I'm sure a mouse would chew on that as well.

• When mice chew on wood, drywall and electrical wires in your house. That means you'll either have an expensive repair in your future, or worse, a fire inside your walls.
• Mice mark their territory by peeing and pooping all over your house. Which is gross. But also a danger in terms of the viruses and diseases they carry.
• Mice have parasites on them because of their filthy habit of being mice. Ticks, fleas, and other parasites all come into your home with the mice.

If you do get a tick here's how to properly identify and remove it. Since we're talking about pests and all. 

Final Tip on Mouse Control.

O.K., so 30% of all homes have mice in them. Some of them even have rats.  I'm guessing you want to get rid of them.

Don't rely on only one method for controlling mice. Use everything you've got. Your whole arsenal. And don't let your guard down.

Your goal is to keep mice out of the house.

Mice are super suspicious but not of the opposite sex.  Ever.  They are constantly having mouse sex and making babies.  Like, non-stop.  So as long as there are mice in this world, there's going to be a chance that one or worse, TWO will get into your house and claim it as their love pad.  By using two or three of these methods you'll have a good shot at keeping the population in your house down.
 

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