Gear isn’t the issue, nozzle isn’t the issue, the tube isn’t the issue.

I have a glass bed, but I wanted a textured base in my prints. I stuck sandpaper on the bed, and somehow it works perfectly.

I got a clog out but it took a lot to get the nut off and had to heat up the hot end to get the Bowden tube out.

Then I saw the heat sink (?) had gunk in it and so did the Bowden tube. I was wondering how you clean it out? I was thinking acetone (I got hot glue off of the motherboard with that).