Basic blender went bad (motor ran but spindle wasn’t rotating). I wanted to disassemble to see if it could be repaired. Three of the four screws were Phillips head. I had to cut the casing open in order to discover why I couldn’t unscrew the fourth. It was a slotted spanner.
PLUG IT IN UNDER WATER!
Don’t forget to use your toaster as a bath toy at the same time.
Well your blender problems would be over at least.