Never had a problem this bad and am looking for suggestions..... After about 4 hours of burning BRAND X on high I get a total massive red glowing clinker that fills the burn pot totally and causes new pellets to pile up in an extreme manner..... I stab this thing with a fork and it stays together (usually) and lift it out of the burn pot..... When it cools it looks like melted black droplets of glass.... This does not happen with other brands I have like Barefoot that produces a nice fine powdery ash..... What's up ..... crappy pellets????? They burn hot and have practically no fines..... Any way to minimize these super clinkers???