Hi
I have a MacBook with a similar issue and I find that a very very small amount of isopropyl alcohol on a brush with fine bristles helps get the dust and debris out
Just some sure to wipe any excess away as this can sometimes get into places you you don’t want it
Also as for dust Getting under the glass :this shouldn’t happen as apple LOADS up the glass bezel with adhesive so that shouldn’t be a worry:-)
Hopefully this helps
Any questions please ask
Thanks:-)