Should be a small white plastic tab. Gently pull and it will come off (the screen, not the tab). Once you get the first one, the rest are easy. Re install is a little more finicky but mark or only do one at a time and put each one back into the same window, I know they all look the same but I think they like where they came from.
Brenda and John
'14 Ram 3500 MCSB 6.7L HO PullRite 16K S/G, Grey Columbus 320RS Camped '14 - 146 days/'15 - 196 days
USN-EOD(Ret), Master Chief, 30 yrs,
Master Blaster of the Navy