Danz, you reminded me that the shelf liner is what I was planning to use
After DH suggested the towel, it occurred to me the shelf liner would be even better and I have a roll of it already. But this morning I was so shocked to find pips I didn't expect that the idea went totally out the window and I just grabbed a towel. I will have to remember that for next time. Actually, what I might do is cut a few pieces to fit and leave them sitting in the incubator room and that way when I need to grab something in a hurry, they will be good to go.
A third pipped while I was in the shower but it pipped the wrong end - I hope it will be okay. It has made rather a large pip and I can see it breathing but I dunno.

A third pipped while I was in the shower but it pipped the wrong end - I hope it will be okay. It has made rather a large pip and I can see it breathing but I dunno.