Used Evergreen 4 in 1 on 20th May. Resulted in brown stripes all down my lawn. Understand this is probably because used too many granules and overlapping. I watered the stripes and used a small hand fork as well. My problem is its now 23rd July, we have had a lot of rain since this nightmare began , but there are still lots of brown stripes some very large. What can I do now? Should I mow the lawn , I was waiting for it to grow back over the stripes..but only seems to have had limited growth on many stripes.

thank you.

As its perfect weather for it, i'd rake up the dead grass and sprinkle some grass seed in the worst areas. It may well still grow through, grass is tough, you'd be surprised what it can come back from. But to be sure I'd re-seed the worst patches.