Bitter sweet but they are the best.
They were waaaay to sticky at first and after cleaning, that's the bitter part. Then I used my shirt to break that problem. Now I have perfected the stickiness to the point that they feel like they are not sticky to the touch but they stick to the IR or bucky with no problems, and stay. If they seem like they arent sticky enough at any time, I dab a tiny drop of hand sanitizer on to clean a small spot and they are over sticky again but they stick great. Lost too many markers because of tape and putty, not any more with these things.
Rating: 5 stars