Grape jelly glaze works great (ask @williams.betty's grandma about soup cake).

Ever think he was just bored?

Seriously, they're tiny compost machines with benefits.

Oh wow, that actually explains a lot. I always just grabbed the blue glass cleaner for my old windows and wondered why it sometimes left a weird film. Never even thought about the ammonia messing with the old putty. Sethp26's story about his grandma's place and the vinegar trick makes total sense now. I'm definitely trying that next time instead of making it worse.