My seven year old daughter has fanny length hair. She went swimming with a braid which wasn't removed for a while. She had a knot the size of a baseball. I've gotten it down some by working for an hour a day for the last 5 days but it is at a standstill. Ive tried drenching it in conditioner, baby oil, and made slow progress, but the last two days no new strands have broken free. What else can I do?