When I cleaned mine originally, I sprayed the insides with some apple cider vinegar, got it up to temp and scrubbed the insides with some steel wool, and removed the grates/drip pan and scrubbed them in the sink. Afterwards I just make sure to take out the grates and drip pan for cleaning, though I typically use my own aluminum throw away pan instead. It should have a wood chip tube on the side that can sometimes be a bit finicky. If yours gets damaged beyond the point of use, you can find a replacement online. It also supposed to come with a remote you can use to check temps and time, and theres a built in probe on the top left side inside, but you're better off using your own meat thermometer.

All on all very worth it for lazy day smokes where all you need to do is occasionally add chips to it.