I've just cleaned it again, it's mucky with detergent. The fabric conditioner part also keeps blocking. I'm fairly stingy with detergents, I use liquids. I wash the machine on empty at 90 as per the manufacturer's recommendation less frequently than I should (every 2nd month or so) and I used white vinegar last time from a MN tip.
What else can I do? I've just removed it and cleaned both sides of it and the inside of the drawer that I could reach.
TIA