Dirty ar brass solved, maybe

[6pakzak]

So after body sizing AR-15 brass I've just been wiping them down good with a microfiber cloth, been using Hornady unique case lube, thought I had it cleaned off good but decided to wipe some down with rubbing alcohol after they are done, actually 4 of them, did have close to max load but they came out really clean after being fired, we'll see tomorrow I'll make some more but does it make sense that maybe I didn't have them clean enough thus not allowing them to seal properly when being fired?