We have been having the same issue recently with our Hamilton STAR, however it occurs on the 96-channel MPH rather than the single channels. The tips also stick to the same 3 channels every time. Our lab is at 55-60% humidity so it does not seem to be a static issue, I have also tried wiping down the channels with soapy water and a kimwipe but it did not help.
I’ve attached a video that shows this problem: [IMG_9349.mov - Google Drive]
The fact that this problem is restricted to the same 3 channels consistently, and occurs across multiple tip types and brands (all CO-RE II), makes me think it is something about those channels. Any thoughts and inputs are appreciated!