EricHei

This is 100% the filter end caps with the soft grip “dissolving” from imbalance. Watch out because it doesn’t redesolve with filter cleaner and has to be manually sprayed or scraped off. Also, watch out for clogged lines after this and blocked sensors on pumps and thermometers. And honestly, it’s probably due to a change in material by a Chinese manufacturer. I’ve seen it many times before.