I've got at least eight cats. Only two of them are housecats .... but all of em do know the lab is off limits. But to work there I've got to change clothes after watching the evening news with the cat sitting on my lap... and then I blow myself off well with the compressor, and often put on a cleanroom suit for fussy film work or color printing. I've got electronic air cleaners, antitistic guns, the whole nine yards. Evertything is frequently mopped and swabbed. Ordinary black and white printing is a little less fussy once the negs are actually in the enlarger - fiber-based
papers produce a certain amt of lint anyway, so requires cleaning up afterwards. I cut my teeth printing Cibachromes, which are almost impossible to spot properly, so learned early on that cleanliness in next to godliness in the darkroom.