Snake has substrate in it's heat pit, should I do something?

[Bogertophis]

My snake has a tiny bit of substrate (coconut fibre) in one of it's heat pits. It's just so much that it makes the heat pit look brown while the other pits are whitish/pinkish like normal.
He rubs his nose against things and has put his head under water so I assume he wants to get it out.
Should I do something or leave him alone? I don't wanna probe around his nose or pits.

You could either try a cool water spray in his face (a little rude but harmless) or hold his head under cool trickling water over the sink. It may wash out.

Or, you could wait for him to shed- they do shed the lining of their nostrils & heat sensing pits.

OR, try sucking it out- like by using a little rubber bulb syringe like they sell in drugstores for cleaning ears: (Just don't expect your snake to appreciate this either, lol.)