if it gonna cook it got to have air flow,so that said you have to put some holes in the bottom of can,sit it on a folded tarp were you can keep thing clean is what vondank was trying to say i believe,any way you still have to stir the mix at least once a week first month and every other next month,the condensation is gonna build on the can lid,thats a good thing,means you are cooking your soil,also gives moisture back to the soil,when you mix it up you need to put a little water in as you fill the can ,the moisture is what gets every thing cracking you dig,but you still are gonna have to mix it once a week for a month at the least