If you have a vertical print washer there is a much easier and less chancy method of FB print washing than the Ilford 5 +10 +5 sequence.
Just give the FB prints a quick rinse to get the surface fixer off them, then a generous soak in hypo clear, then load the print washer, turn the water on,
and walk away and relax for 45minutes to an hour. If your print washer is any good the prints will be washed to archival standard.
This is what I do. No failures in 50 years.