Ok, so my dog decided to pee in one of the ducts located on the floor. I don't really know much about HVAC. So my question is, how do I clean it? I searched and only found info on how to clean out dust. Could I just pour some sort of liquid cleaner down the same spot were the dog peed? The vent that got peed in is on the main floor, and I can now smell it coming out of one of the vents in the basement. I've turned off my heat just in case. Please help!!!!