I have used Lawn Mutt for two years; this year I received directions as to what to do before the snow came to prevent damage over the winter. I will get back in Spring and hopefully there will be no damage. Pictures when snow melts.
I'm impressed at how quickly the lawn recovered after applying this product. It, coupled to generous watering and grass seed, almost completely fixed it (we started too late in the Fall, so there may be more opportunity when Spring comes.)
I’ve used this product 3 times so far and it seems to have halted the damage. I live in zone 9 and it was applied to Centipede. I haven’t seen the grass actually growing back yet.