Sand under bezel?

[moo]

Hello...

Spending some holiday time in the largest sand desert (empty quarter). Nearly died getting to the to of a sand dune with the sun beating down on me (also see over weight and unhealthy).

Point is I lay on the sand to get some rest. When I got home I washed the watch (GMT IIC) well however I can hear a faint grinding sound when I turn the bezel. Can sand actually get under the bezel? What should I do?

The bezel does turn properly, it's not stuck. Also the watch is working fine.