Aww, so sorry top hear that. I think the spray got more than the baseboard heater. Have you tried using a backlight to see if any pee remains, maybe in the flooring or carpeting?

And cat pee does not contain the taxoplasmosis you are cautioned about - that's in cat feces, so if the smell of cleaning products doesn't affect you adversely, you can help with the pee clean-up.