Some lip balms are more of a safety threat than a beard . When assembling oxygen supply lines the use of grease is verboten .
They might want to put some thought into lip balms used for sunscreen at altitude for use with oxygen equipment .
Beard grease and oils , beeswax, petroleum based mineral oils used on the facial beards might not be a smart choice while using oxygen .
The use of moisturizer on deck might need limits . Although I have yet to read any accidents caused by an overly moisturized situation.
Hands slipping off the greased up Yoke ?