I only clean my jars when I change up strains.
Then I use 91% - 99% ISO alcohol depending on where I end up getting it. Regular stores, typically only have up to 91%. During the pandemic when everyone was out of Alcohol I found a supplier that had 99% lab grade and have used that a few times to clean pieces and jars. Add a little bit of salt which acts as an abrasive, I do a mix of kosher and table salt on pieces and just kosher or the jars. Shake the hell out of the jar, and if it's really bad let it sit for 24 hours and shake again.
Sparkling clean every time.