MICE! It's that time...

Comfortably Numb

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I got to my boat and found I had mice - discusting!!!! They chewed up my upholstry, a few wires, any food that was in paper, and generally mad a big mess in - just 3 weeks. Now that the weather is getting colder, they are looking for shelter, and boats are great.
My boat is in a covered slip and they just jump on board. In my case, I had just put in a new vertical windlass, the the hole to the anchor locker was plenty big. They say mice can get through a 1/4" slit, and rats a 1/2". I plugged the anchor chain entry with steel wool - they hate chewing on it, and it should not do any harm as if I forget to pull it out, it will come loose when I drop my anchor. Another boater said he saw a hugh rat leap off another boat and run down the dock in broad daylight - scared the hell out of him!

Some good advice:
Keep no available food - they chew through plastic and paper.
Keep no water available to make them comfortable.
Plug all holes either with steel or copper "wool", or very fine wire mesh.
Watch leaving your portlights open as they will chew through the window screen if its plastic.
Put a fine mesh , like 1/4" square, between your engine room air intake vents and the hull - they can usually squeez through the normal vent openings.
Plug any small holes going from your engine room into the cabin with steel wool or metal screen. The rule is, if you can get your finger in the hold, a mouse can get through it.
Leave lots of traps around - concesus is the snap-traps are the best with peanut butter as bait as it last a long time. I have about 15 all over now!!!
Decon works, but if they die on your boat, they can stink. I still have Decon in my bilge and in out-of-the way places but be sure to keep it away from kids and pets!!! If a mouse dies from Decon, and a cat eats the mouse, they might die.
Mice and rats are good jumpers, but they will usually follow a dock line so putting a big funnel or 10" SMOOTH plastic disc on lines will help - but only helps if they can't just jump on the boat.
Concesus says that the ultrasonic deterrents don't work and they get use to them quickly, although they might be anoying enought to make the mice walk down the dock to another boat.
Fox urine is suppose to be one of the best deterrants, although I could not find it. Spraying it around the dock and on the posts near your boat seems like a good idea.
If you do find them on board, it is HIGHLY recomended that you wear rubber gloves, have a good disenfectant like Chlorox to spray everything down, wear a good face mask, and don't vacuume up the crap as it puts it airborne and can carry lots of disease. Wet it down with disenfectant before cleaning it up. It took me well over a half day crawling around every nook and cranny to get it cleaned - they went everywhere!

These are just my ideas from first hand experience and reading on-line - your comments and ideas are needed as with this really cold weather, lots of boats will have new visitors!

Good luck and I hope nome of you come to your boat and find the mess I did!!!
Jim
 
Sorry to hear about your problems with mice but thank you for your advise.
Is this mostly an issue with Delta's marinas?
 
Shake Away Fox/Bobcat urine pellets are available from Amazon, among other places...
 
My shed neighbor had large rats invade his boat last winter. He finally stopped them from returning by lining all the posts which supported the shed roof around his slip with the thin sheet metal used to line chimneys and vents on a roof. It is about three feet high from the deck and he has had no more rats or mice since.

I've found that moth balls will deter mice from staying. I use them every winter in my garage and my RV. The have to be replenished about every month. I've read that pure oil of peppermint soaked onto cotton balls and placed strategically will keep out mice and spiders. I am going to try this to see if it works. Peppermint would be a better smell on the boat then moth balls!
 
Sorry to hear about the rodent problem, Jim. Thanks for the great advice. I'm buying 5 large funnels tomorrow!
 
I have heard peppermint and mothballs both work as well, and peppermint certainly smells better! I read on another site that the fumes emitted from mothballs can bother some electrical equipment - not sure if it's true, but worth considering if they are really close to equipment. Sheet metal is a good idea on the posts - simple and effective. It is smooth enough that they cant climb it and pretty cheap stuff - I think I might do that next trip down. A good staple gun should go through it so putting it up is would be quick.
RadioActive - Shakeaway - thats the stuff. Seems the way to do it is put it into old socks and tack them to the posts on your slip - the goal it to keep them off your boat.
Arnold - I don't think it is specific to the Delta, although being a rich Ag area, there are lots, and when the weather gets cold they look for winter food and shelter. This issue is also a big problem with boats (or RV's) sitting in areas where they migh be loooking. All of the above hold true, but whith a trailer boat, be sure to keep the lines that hold the cover as far from the ground access as possible. They cannot climb fiberglass gelcoat, but if you have a line going to your trailer as a cover tie-down, they will climb it and probably get under the cover and into the boat.
Jim
 
The early bird gets the worm, the second mouse gets the peanut butter. Stickey traps work well also and will get more than one mouse at a time. Ever met someone that collects Bob Cat urine?
 
I've never heard of moth balls being damaging to electrical equipment, but I have heard of mice and rats eating through the insulation of electrical wiring.........
 
Putting peppermint on moth balls, and collecting bobcat urine???
I think I'll pass.
 
Yesterday I moved the dresser in my bedroom away from the wall and found some strange collections behind it. At first I thought it was a large collection of dust bunnies, but on closer inspection it was a bunch of threads from a carpet along with mice dropping.

Oh oh. Having a mouse nest and droppings is bad enough. Yes, I put a few moth balls back there, but where is that mouse [and others????] getting in? So now I have to try to find the entry spot and plug it with steel wool. Maybe I'll put that sticky stuff around places like drain pipe exits and such to try to locate what I need to plug up.

Or get myself a good mouse house cat!

Another winter project to while away the time until boating season gets here again......
 
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