My stickiness never got better, then it got worse before breaking entirely. It was about 18 months after purchase so out of warranty. TB doesn’t offer any paid repair or spare parts, they basically said “buy a new one”.
As such I opened it up and I was in fact able to fix it (for now), but I’m convinced that adding a 1 1/4" hose clamp will improve longevity if yours is still working (and out of warranty so you have nothing to lose): post and pictures here. Mine broke entirely so you can skip the metal braces, but I think the clamp is a no-brainer to greatly strengthen the pitch mechanism. (I’m not trying to spam the forums about it, I just want others who own it to not have to go through what I did).