This is the one to use
https://www.amazon.com/Grill-Rescue-Replaceable-Cleaning-Bristle/dp/B07YJ16RQG/ref=mp_s_a_1_1_sspa?crid=TC4UB35DNL7I&keywords=firefighter+grill+brush&qid=1702141769&sprefix=firefoghter+grill%2Caps%2C168&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&psc=1
Like all the others here if you go low and slow with chicken skin it is harder to crisp up. Ill do a smoke tube, sometimes, but always hot and fast. The only method I've found to work doing low is to pop in fryer to crisp.
So as others have stated don't cook to temp cook to feel. Wrap at the stall whenever that hits, start probing at 195, put your water pan under brisket ontop of drip pan and ensure to trim.
I think you'll find most foods (ribs, chicken, steaks) you'll do fine smaller cuts but something like a brisket is waaaay more forgiving doing a 15+lb packer vs a small 4lb one. Just my experience