My boyfriend and I got a puppy a few months ago and as puppies do he's peed in the house here and there. I cleaned each mess up each time, but now that winter has started and were using our heater, we can smell it even though we cleaned it? I'm pretty grossed out by it and need some help figuring out how to take care of it.

I want something I can take care of all the carpet with, because I obviously can't remember were he peed each time.

Anyone who can help out there?

You can purchase a dog urine kit with a black light and an enzyme that will consume the remaining urine. Black Light World - ZAP Pet Stain and Odor Removal

Odor removers with enzymes work great as ballenger has suggested, but I just use the old fashioned baking soda trick. Just sprinkle baking soda on the area, lave for an hour or so and then vacuum up. A bowl of baking soda in the fridge can get rid of nasty smells in there as well, wonderful stuff.