Joe painstakingly erases the eraser
Here's a brief description of the contestant's attempt. Someone's probably working writing up more detail!
Joe initially broke it into two pieces, then rubbed it against sandpaper, eventually disposing of the rubbings outside in 19 minutes and 32 seconds. He was initially awarded just one point but, after viewing Iain and Paul flushing their erasers down the toilet, ranted about how he was fed up about such "wanky workarounds". As a result, he received 3 bonus points for being the only one to completely erase the eraser.
(Written by Taskmaster Wiki contributors)