I have a houseplant, a begonia. Usually the cats are pretty good about leaving it in peace. However. Last week I gave the plant some water, then left for work.

When I got home, I found the cats had amused themselves by dipping their paws in the dirty water and flipping drops of mud all over my nice snowy white window blinds. AARRRGGGHHHH! I've tried and there's no way to wash off the mud completely. So now I have a polka-dotted window blind. What will they help me with next?