I got this California Bell Club 50c chip with a bunch of other chips. I didn't need the chip and wanted to use it as a trader, but it was dirty. I thought that steam would do a good job cleaning it. So I put some water in the tea kettle and waited for it to boil. I couldn't hold the chip in my fingers, the steam was too hot, so I used a pair of needle nose pliers to hold the chip. The chip started to get clean, but the clay softened from the heat and the pliers left a lasting impression at the 8 o'clock position.