Welcome to Pellet Fan!
I just use soft cedar shakes, buy at HD in a big bundle. Heat grill, use narrow end of shake/shingle and toss (burn) after 2-3 uses. The soft and thin profile allows it to “wrap†around the grill bars better
Bushopper - "glasses"? Are you getting old too?? I always WIPE my grates after scraping or brushing. Just in case.