A few more notes
It shound likethe kiln paper you used is not the smoothest available- it is Bulllseye Thinfire. It looks and feels like cartridge paper.
vacuum on low suction should be enough to clean the kiln. Do not damage the interior of the kiln by knocking it or sucking at the insulation.
Yes you can use the sanding and buffing attachments for the dremmel. Be sure to keep everything damp, for your health and the health of the glass – heat buildup will break the glass. The buffer should have something like jewellers rouge or cerium oxide as a paste to polish the edges. It is messy.
Glad you have found a way to begin controlling the heat.