My younger cat was adopted as an adolescent and is still learning how to live in an apartment. He’s come a long way, but he’s still doing naughty things when I’m at work. Mainly, he climbs onto my piano and knocks stuff off it. Today I came home to a broken picture frame. I know he knows it’s bad because he’ll jump off if I catch him. I’ve tried crowding the piano lid with more stuff but I hate how cluttered it is. I don’t know what to do because this mainly happens when I’m not home.