Originally Posted by mattathayde
you can just cut a bit of some cloth or something to put under it if it bothers you that much, even a piece of paper towel would probably work fine. for a permanent fix you could glue a piece of cloth or use some tape on the bottom of the tray to pad it a bit
Before my diffuser, I used a donut shaped paper towl cut out that covered the tray holder. worked really well.