Any ideas on how to get rid of anything alive in old shedds before cleaning them out? There are 7 old shedds/barns on a property I am renting and I would like to clean the debris and trash out of them knowing it makes it a breading ground for things i dont want to share space with; snakes, rodents, hornets. I don't want to get any animals like cats to get rid of them. Thinking some type of bomb to go off in there and then something to keep them away in the future. I know nothing is full proof but the trash and debris is encouraging the welcome everyone sign I don't want to put out.