Yikes! I have enough trouble when I find a spider in the bath.
I've never found pests in the bathroom, but I do have a problem when I wake up in the morning and wish to take a bath, and the (dry) bathtub is occupied by any one, or any, or all, of the cats--Abbie, Snow, Junior, Apricot, Floyd, Gordon, Harold, George, Ellie, and Leo--sleeping in it.
The rest of the house is equally clean; I can't figure out why the cats sometimes prefer to sleep at the bottom of the bathtub.