Flr. By the way, welcome to our forum, why don't you officially introduce yourself in the greetings/tellus about yourself forum.
You have received some good advice about how to move bees to look at the work they are doing beneath that pile up of bees. My preference is to gently blow on them -- they move willingly, carbon dioxide means predator.
Another method, and there are many times when you will require the frame to be reasonably free of bees is to gently take that frame and give it a firm but very gentle "one shake". THis is true, esepcially for brood frames that have larvae in any stage in it, even with capped brood. It is very easy to dislodge larvae in uncapped cells and damage brood that is capped. Hard to describe the exact manoveur , but I will try. Hold the frames with one hand, jerk it downwards gently, once. That is all. The bees that remain on the frame, you will have to deal with. Sometimes I will hold the frame in one hand and with my other hand bang my wrist gently with my other hand, that will dislodge bees too.
When you have lots of bees on yourself, a fast way to get them off is to jump up and then down, hard, most of the bees will fall of quickly. Sometimes this will be done twice. Just some tips, hope they may help. Have that wonderful, most awesome life, day and health. Cindi