another thing that you can do is if you havn't planted any thing in there is to let it dry out or put it in the over at 400 degrees for 20 mins to stearlize it ....... most people will say to bake it ....... I started doing it on my second grow ....and just get the water out of the soil .... they like it damp .....baking the soil don't smell that great but with some air freshner it will be ok....