Not sure your PCB implementation, however I would take a failed unit, Put some scotch tape over the hole then wash the board with warm water and soap. Rinse well with warm water and dry the best you can. ESD aside, I use a short blast from my compressor.
Allow to dry and retest.
I suggest warm water as opposed to hot because I don't know what pressure trapped air in the sensor will reach if heated too much.
If that resurrects your sensor I would suggest a silicone conformal coating spray. Some folks like urethane but I prefer silicone as is is softer and less likely to stress the components. Acrylic works as well.
I always wondered how a HomeDepot can of Minwax Clear Urethane spray would work. Never tried it but still wondering.