Oooh nice!! thats my kind of price! I love goodwill I never would have thought to look for liner!I found several rolls at second hand stores (Goodwill, St Vincent de Pauls) I think I paid .50 cents a roll...Of course they aren't complete rolls but enough for several hatches... Its my go to place when I am looking for anything..
I checked one egg very quickly (rsn to the bathroom, candled for 10 seconds ran back. I could not see the air cell. What does that mean?
sometimes I will just put the flash light right in the incubator and do a top-down look for the internal pip

are you sure you candled the large end? the air cell should be at it's biggest size by now. it will start to become very dark/black inside (no more clear)