During my initial attempts to cut aluminium I managed to gum up a couple of end mills.
I have also gummed up some regular drill bits when drilling out aluminium with a drill.
Removing aluminium the easy way:
I have used regular caustic soda granulas (a table spoon worth) dissolved in in a few oz of water and placed the gummed up bit into the solution. Left it over night immersed and removed it the following day, all fresh and shiny like new
Only aluminium will be dissolved, steel and other metals will be unaffected.
This is not something I can credit for, its not news but with many newcomers one might not know all the tricks yet…
Disclaimer: Caustic soda creates heat, can cause severe chemical skin burns and must be handled with great care, good ventilation is a must.