I had to do something today I never thought I would. I have mentioned all through my listing that we have two guest rooms in the home with a shared bathroom. There are house rules both in the listing itself as well as the check-in instructions to not leave personal items in the bathroom since the bathroom is used by more than one guest. Mainly this is to prevent people from leaving things like underwear on the floor, draping wet towels over the shower rods so others can not close the curtain, and leaving things like personal body wash, scrunchies, etc, in the shower where another guest could accidentally touch something that has touched another's body.
Over the past few months there have been numerous violations of these rules by several guests. Guests often will leave their wash towels in the shower, their personal soap products in the bathroom and several times there has been personal clothing items, including women's underwear, left on the bathroom floor or hanging on the shower rods to dry. There has also been on ongoing problem with guests leaving both the light and fan on in the bathroom, then closing the door when they are done so that other guests think someone is still in the bathroom (that one I cant figure out - our house rules also say to leave the bathroom room door open when not in use and turn off lights when you leave a space).
Today I mounted a sign into the bathroom wall listing the "Shared Bathroom Rules". Its a professional plastic sleeve sign, the kind hotels use on the back of the doors, to clearly show guests what the rules are about the shared bathroom. I had to do this because guests are apparently not reading my house rules and some are just oblivious.