I hatch quail all the time.
I meet my humidity close to 30% through and don't raise it until I see an external pip. I only raise it to about 50 and never higher.
I have many 100% perfect hatches.
You didn't mention the type so I assumed coturnix, sorry.
I use paper towels and never had an issue.
I think your temps and humidity are off and not what you think they were if your eggs haven't hatched by day 23.