Don’t go straight to that course of action, the button caps can be gently pulled off … it needs some very careful pliering and probably some tape on the end of the pliers to prevent scuffing - the cap can be pulled straight up as it’s a simple friction fit … this will afford you a looksee at what is happening underneath - also look to see if the perimeter of the button hole is catching on the button edge - this has also been documented as a sticky button cause
in terms of cleaning if you find spillage etc i’d seek clarification from support to prevent greater damage if the wrong approach is taken - I guess you might find a fractured button which would need to be replaced professionally
best run any action past support first to prevent you blowing your warranty tbh - yhbw, but I can’t see them objecting to you peering onto the button if the cap is pulled of carefully