While you're screening, might do the furnace, fridge, AC covers, and gray / black tank vents as well. I never thought it could happen, but I had the dobbers trying to build in one of my vent pipes last year. Talk about aggravating hearing that buzzing inside a wall. I removed the little caps, hot glued a piece of aluminum screen to the top of the pipe (cut the same size as the pipe OD), then reinstalled the cap. Those suckers will build anywhere.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.