OK it's not my toilet, it's the one in our en suite but it makes me irrationally stabby when I've cleaned it & does his usual come-in-from-work-and-sit-on-the-loo-with-the-laptop-for-an-hour
I might even check for skid marks afterwards 
His feet leave lumps of sock fluff everywhere on the newly-vacuumed carpet as well 
What post-cleaning events drive you nuts?