Suggestions for Skate Bite?

Currently dealing with a persistent skate bite problem.
So far, we've tried:

• Lots of vaseline worked into the skate tongue
• Foam cosmetic pads wedged behind the tongue when they are laced
• Icing after every game or practice, and every day
  
• Stretching
• Ultrasound at the physiotherapist

Four weeks and counting... any other suggestions? Perhaps only a few weeks of rest is the solution.