I have poisoned and killed a mouse in my 2 year old son's room. It smells really bad!! What can I use to get rid of the smell if the body is in the wall somewhere. The mouse never got through the wall, I put the poison under the house thinking maybe he would die there. I checked out www.bugspray.com's product called NnZ but it is very expensive. Is there anything else that is effective and yet safe to put in his room?