New pair of Timberlands (first pair ever!). Sooooo comfy, and - oh, joy - my orthotics fit 
But...
The orthotics squeak unbearably, unwearably, in them. 
The orthotics are rigid, prescription half-orthotics. Unchangeable. The shoe is fabric-lined, with leather at the heel. I've included a photo with the orthotic pulled forward, not in its normal position of hard up against the heel.
How can I stop the squeaking?