zemyla said: How do wizards deal with house pests, like cockroaches and fleas?
Mostly they talk to them and ask them to leave. Always with an eye to their needs, of course. These affairs can’t be one-sided.
(It should be said that species as old as roaches and fleas can be very single-minded and difficult to convince if you approach them correctly. But patience and the right courteous tone will normally bring them around.)
And then of course there are always specialists. From "Theobroma":
“What are you looking for, roaches?” Ana sounded indignant. “We’re very careful here. We don’t have roaches!”
“On the contrary,” Ken said. “You are very careful, and as a result, you have very careful roaches. Guys?” he said in the Speech, and whistled.