[mudkip]

I had this issue too at one point. I ended up soaking that part in vinegar (to remove the gunk on it) and then rinsing it off with water, which ended up fixing it. I assume it was just grinding due to mineral build up. Seems like it's a pretty common issue, as it's even listed on their website in the FAQ.

[fisherjeff]

Okay I could’ve sworn I scoured their website for this information. Granted it was a few years ago so maybe it’s new...? I’d found the “push the rubber coupling” tip, which has helped before, but I am breaking out the vinegar as we speak - thank you! I owe you one.