What kind of grubs? Mealworm larvae often make their home in my pile. Beetle grubs are something I've never found in there - they prefer the soil, IMPE.

Gotta pic?

I'd be surprised if your bugs are the same as those that live in the soil and eat roots. For example, I get grubs of black soldier fly in my compost pile - thousands of them. They only eat decaying organic matter though, and only live above ground. Carol is right - a picture will really help.

Are you adding native soil to your compost? Do they look more like big fat grubs or maggots? Probably black soldier fly larvae if they look like maggots. They're good guys. The big fat white grubs are the enemies. PIck those out and kill them.

good working compost heats up and should kill weed seeds and all those crawly things. Of course it seem like you have to be a Compost Master to get that perfect mix in order for it to heat up. Good luck

Whoops - Soldier fly is the one I was thinking about, not mealworms...