I have a few lawns that are extremely cooked. These lawns are crunchy and probably a fire hazard! I am getting ready to put down my 3rd app./Mach 2 combo. The fert in the Mach 2 is 24-5-11 50%ppscu. Is there enough slow release in this product to benefit these cooked lawns once the rain comes and the weather breaks? (I hope it rains soon). I know Mach 2 doesn't need to be watered in right away, however just how long can it sit without being watered in before it becomes ineffective? This is the worst I've seen lawns here in the Pittsburgh area in a long long time.