A shop vac is your friend. And a power washer for your grates.
I put foil layers over the drip pan that way I can easily get rid of all the dried stuff. Like @JM4CY a small shop vac is your friend. I mentioned this on here before, as I take your grates to the car wash. Putty knife and non wire brush can also help clean your grates and inside.
Thanks guys, I already have a shop vac and planning to foil my drip pan. Good tip on the power washer and car wash, wouldn't have thought of that. How often would you say you're cleaning your grates like that? I bought a Rec Teq and I see that they just released Teflon drip pan liners that I think I'm going to give a shot as well.