I have a friend that has a situation.

He had someone “help” him to do a floor refinish.

They sanded the old floor with a commercial sander to resurface and get down to bare wood.

Next, the “helper” put down a coat of Poly on the bare wood, straight from the can un-thinned.

After the poly had 1 day to set, they applied a coat Miniwax Stain - I am assuming oil based.

They were going to apply a second coat of stain after it dried for a day but it was still tacky.
They waited another day but it was still tacky.
After a few days it is still not drying.

Personally, I think the Miniwax stain reacted with the poly and will not allow the poly to cure.

They tried to use a dehumidifier, but that did not work.

Has anyone ever experienced this sort of thing?

What can be done to fix the problem?

There are 5 rooms and a hallway with this problem.