Hi H., we have had LOTS of scorpions in our house this year. We did 2 things, first we removed all the wood piles and tree limbs from around the house and second we had the entire house and crawl space under the house sprayed by a professional. I'm not sure which one worked, but I've only seen 1 scorpion in the house since then. I've also been buying some BUG STOP from walmart and spraying it around all the pipes, doorways, and windows just for prevention. The professional said they come in to find water and usually come in gaps in doorways or up drain pipes. There's a possibility you have a gap or a small leak in your drain pipe allowing them to come in, maybe if you fix that spot they won't have a highway into the bathroom. Also, you can't drown them... if you wash them down the drain with hot water they will still find their way back up, I figured that out the hard way.