This video shows ways of using a silicone massage cup to lift the IT band off of the underlying muscle (Vastus Lateralis of the Quadriceps group). This can be done with gliding the cup over the IT band while it is stretched. It can be even more effective if you flex and extend your knee while gliding the cup. The knee flexion and extension will engage and stretch the quadriceps while you are lifting the band off of it.
All this work needs to be relatively pain-free.