Lucario

Yes. I've had this problem with M65 RGB along with my older, regular M65.

Since when I bought the original M65, I've been using it for long time in my life and I liked it. But the middle click began to become less responsive. I've had to press it harder to actually register the middle click. Then I was going to RMA it, but decided to have it on my secondary computer (HTPC) and buy M65 RGB for my main PC. A while later my M65 RGB has the exact same problem with middle click not registering. I was disappointed that I might have to RMA it. I was frustrated trying to think of a better and quicker solution. I can recall similar problem with other old technologies which the buttons require harder press to register, or sometime won't register at all. The culprit is usually dust or other dirt between the button conductors and had to be wiped to make the button work like a charm. While it's quite impossible to disassemble my M65 down to middle click's conductors, I rotated M65 RGB to right and mashed the middle button as fast as I can as if there is dirt beneath it and pretending I was trying to shake it out. The middle click now works like a charm. I was excited and thought I could do the same with my older M65, and I've done it and it now works like a charm too! I was amazed how simple it can be to get them working without having to press harder. You can try it for yourself if you have the same problem with middle click not registering without having to press it harder. Though be warned, it may wear down M65 mouse faster.