Right. Regular oven windows need cleaning to. It's just how often you want it cleaned. I let it go and take a razor to it. I'll get the 340G at Sam's (trapezoid window) if I have a need in the future but love the gen 1 40. The door around the window with the 340G is thicker than all other gen.
Interesting---I didn't know the Trapezoid Window was thicker!!
I keep my Window real clean---Doesn't take long if I clean it before each use.
I like it clean, because I left out one of the things I like about the Window-----I like to gaze at the Beautiful meat that's being Smoked inside my Smoker.
And if I get company, they always want to see what I'm smoking, and I can show them any time without opening the door.
Bear