Whoops, they did it again...

...the field mice, that is. They got into the shed and ate the riding mower, again. Their damage detected this spring amounted to just under $400. This has become an annual expense. So I bought mouse repellent, mouse poison and mousetraps, and applied them to the critical areas of the shed. I'd already tried mothballs, but it appears the mice rolled them around. The repair guy this year suggested placing Brillo pads in the engine. I tried that, even putting one under the seat where the mice had  previously destroyed the kill switch. I'd read that Irish Spring soap kept mice away; I gathered up all my leftover soap bits and pieces, put them in  mesh bags, and distributed them in the corners of the shed next to the deterrent packs which have evidently lost whatever power they may have had. I also sprayed Raid and poured Clorox along the shed walls, but that was just my idea.
       Joe just discovered mouse damage again, with mouse corpses permeating the engine when he tried to start it. He got the mower running, but the damage has been done.  To forestall more damage, I visited Walgreen's. I asked for  their most toxic mouse poison, but they didn't have any, only a few traps, which I already have. The woman stocking the shelves suggested I look in ShopNSave.
There, I bought some mouse death packs, guaranteed to kill, re-peanut butter- baited  the existing traps, and stuck newly purchased fabric softener sheets, the smelliest I could find,  all around the shed and mower. The clerk at Walgreen's said she put them in her attic and had no more mice.
      I suppose it sends a mixed message trying to discourage the mice while simultaneously luring them to their demise, but the mice are free to pick and choose.