So I'm a little late on this but-
We use Rescue (formerly Accel) at a dilution ration of 1 cup to 1 gallon (1:16). We allow a minimum contact time of 5 minutes. Our protocol for things like ringworm and parvovirus is to spray down the affected areas 3x with the 1:16 dilution. Not strictly necessary but it does help ensure that all affected areas are properly covered and receive the 5 minute soak time. An important point that often gets missed: a 5 minute soak time means that the area is WET with the rescue for the full 5 minutes. If it dries before the 5 minutes is up, it isn't getting disinfected because the rescue isn't really working anymore. So it actually has to be saturated pretty heavily to stay wet for the full 5 minutes. Letting it air dry is preferable but if you need it right away, drying it off is fine. And no need to rinse the kennels afterwards.
On another note, I'm not sure what you mean by plagued but I'll take a wild guess that it's repeated ringworm diagnosis cropping up in cats from that room. My thought is that while your disinfectant might be an issue, you could also be missing some crucial cleaning areas. You'd be surprised at somethings that can get missed, simply because they're typical things that get overlooked. If you haven't already, my recommendations: the entire room should be thoroughly cleaned, not just the kennels. Spray down the walls, doors, floors, the inside and outside of every cabinet, shelf, drawer, and garbage can. Clean everything. Wash all towels, blankets, toys, dishes, etc. that are currently in the room. Throw away everything in the room that can't be COMPLETELY cleaned. That includes fabric cat towers, boxes of exam gloves, whatever. Ringworm spores travel and get on everything. Ideally, you could deep clean this room 3x to ensure everything was fully disinfected, but one good soaking should help tremendously.
As for protocols to treating ringworm (if you're interested), here's our process:
For treating ringworm, we use the anti-fungal medication Terbinafine; it comes in both liquid and tablet forms. Once a day for 28 days along with twice weekly baths in a lime-sulfur dip. Really young kittens get a sponge bath. They aren't towel dried; to be effective, the dip has to air dry onto the fur to kill the ringworm spores.
Our kennels are double sided, so each day the cats are sealed into one side of their kennel. The other side is completely stripped and sprayed down with accel. Anything made of cloth material (blankets, toys, whatever) is removed and replaced. Dishes, plastic toys and litter pans are returned to the kennels. We are hoping to reach the point where we can replace and wash everything everyday or at the very least on bathing days. Haven't quite gotten there yet but hopefully someday!