What Dirt and Sand Combo to use for Ackies?

[Passissmokes]

Hey everyone, Im having a hard time finding what kind of soil to use for my ackie monitor. I can't simply use dirt from my yard because I'm unsure if pesticides have ever been used. Would prefer to purchase some kind of safe soil from a hardware store or something. Has any one use any store brand soil with success? Anything from HomeDepot or even on Amazon? Don't mind buying soil thru amazon. Ive been using eco earth for now mixed with sand its ok at first but so hard to keep humidity up and soil dry out so fast


thanks appreciate it!