A few weeks back, something chewed through the dehumidifier hose (a plastic garden hose). I put a new metal hose in. The next morning there's water all over the floor, looks like I didn't quite get the hose all the way out. Silly me, cleaned up the mess, put the hose back in place, next morning the same thing.
Great... so whatever chewed through the hose is still coming in, but I know where it's coming in as it's pushing the hose out of the way to get in.
So I blocked that (small gap on the edge of the garage door) off with some wood.
This morning the wife mentions that her windshield washer stopped working about a month ago.
Ding ding ding!
I'm guessing some clever/thirsty rat chewed through the hose to get a drink. After draining both cars it attacked the dehumidifier hose. So probably both cars just need hose replacements.
But rats are pretty clever, assuming it hasn't died from methanol poisoning already (the cars are both from Colorado, we put blue stuff (methanol) in to keep it from freezing and its residual from then), it'll probably find a way to get back in.
Wonder what else it's been chewing on.