post a picture of the root with white light so its easier for the doctors to see. its probably just the root though. they look a bit hairy i think early on.
60% is not too much. you want 40-60 during veg and around 40-45 during flower, or lowest you can get it during flowering at least. clone/seedlings i believe you want 60+ so no its not too high. whats important is airflow and air movement, though. humidity + stale air = fungus/mold