i was getting annoyed (like lots of people here) and i didnt want to take my machine apart, and being a jeweller, i have this;
its like a rubber sandpaper: but because its in a block, its quite easy to be precise. I also covered the actual screen with some paper to catch any debris.
anyway - it worked nicely for me, and you can use it to clean your jewellery too!
http://www.cooksongold.com/Jewellery...prcode-999-CFK
A medium/soft rubber block (approx. 3 1/4" x 2") impreg- nated with an abrasive. Can be cut into a required shape or used in the block form. Suitable for cleaning an area of a surface or simply to create a satin finish.