There is perhaps one or two things that saves Glitch from bearing the full brunt of Bagoas' ire. For one, he is a foreigner, and as such very probably doesn't know any better (neither did the Macedonians, though they at least didn't sully the water they would draw from unnecessarily). Secondly...

Well.

Secondly, Bagoas is currently otherwise occupied enough that there's little room for upset.

All that (no longer quite so pale) skin and all that water...clinging to all that dark and silvery hair like tiny gem stones.