No clogging or tools ever needed if you use this stuff between materials and ever so often when using pla https://www.amazon.com/eSUN-CLEANING.../dp/B00MVIYNFW
I still have most of my .1kg left after 2 years, never ever ever have I had to manually clean a nozzle and I print with ABS, PETG, Nylon, TPU an PLA.. Other tool to have is a brass bristle brush to buff the outside of the nozzle with so it stays clean..