Explore and find what works for you.
RiO is one of my favorite devices of all time, but I fucking HATE the Core Bangers and use others... I find them to be a PIA to qTip and keep clean, especially if it is super tight between the core and the outer wall. Fuck these. I recommend getting yourself a round bottom, or something else.
Why Q-tip when you can soak the whole thing?. I can look around I guess but I've never had problems cleaning any of my pieces. I just want something quality that won't break easily and functions well.