my patches didnt stick around. i never let it get to the point of where it was dark.
i also have really light skin so i dont know if that makes a difference in the way it looks. mine would tingle/itch. the neem stuff also heals your skin in general so perhaps thats why it didnt have hyper pigmentation after i was using it. i do remeber having patches without the itches when i first got the rash. the itches would come and go. so maybe it was hyper pigmentation. before i was using the need my patches were browning at times. after the neem it would just get pink and red as it was going away.
if you use a brush make sure you replace it after you get the rash cleared up.
i like the scrubby gloves because you can throw it in the washer. maybe soaking your brush in oxyclean once a week? i think being a clean freak also helped keep it away once it was gone. (washing everything constantly during treatment including my scrubbing gloves)
if it keeps coming back after doing all this, try the Bowel Cleanse thing.