I'd be inclined to agree with Steve, Wood bug creature sort a thing, Bake your aspen like a tray of cookies around 350F for 10-15mins Should kill off any nasty little thangs. Oh and if you don't like the smell of toasty wood, boil a little water with vanilla in it n your house will smell like your actually baking cookies <<<Awesome trick I learnt for selling houses, makes them more inviting. Always did it in a kettle so I could leave it on the stove without it looking outa place.