Ash build up during and after cooks can be caused by a few things. The brand of Pellets being used... Not all pellets are created the same/equal and some are known to produce more ash during cooks then others. The amount of excessive sawdust in the bag of pellets being poured into the pellet grills hopper can blow out and cause a mess, the fire pot not being vacuumed out from prior cooks can also cause excessive ash to accumulate during the cook just to name a few possible causes. I’ll say this about the different brands of bbq Pellets, I prefer using Lumberjack Pellets because they produce the best smoke flavor for my cooks, but they also produce a little more ash then some of the other brands of pellets I’ve used, but I can live with that. If You’re seeing ash all over your food, besides changing the pellet brand being used, I would also try spraying the underside of the flame broiler with either a light coat of grill spray or put a light coat of cooking oil on the underside and wipe any excess oil off with a paper towel.. The ash will stick to the underside of the flame broiler and not get on your food... You won’t create a grease fire if you wipe any excess oil away. The grilling door that slides needs to always be in the closed position or you’ll have ash all over the place as well. When You want to grill something, then open the slider, but if you’re bbqing below 300* degrees, make sure the slider is in the closed position covering the Flame Broiler... Remember, these are Pellet Grills, so some ash is completely normal, that’s why is wise to buy/use a Shop Vac to help keep your pellet grill clean. Just a few helpful tips.. I hope everything gets figured out, it shouldn’t be that hard.. Good luck.
PB Austin XL in SoCal and Always... Semper Fi