It takes a while
What type of OCD does she have?
Put her on therapy along with medication for faster and sustained outcome.
I believe you should discuss your concerns in detail with a mental health professional to gain an insight about nature of problem and ways to overcome it through psychotheraputic techniques
Next Steps
Consult for online psychotherapy with any psychologist
Health Tips
Take medicine regularly don't skip. Don't go doctor shopping stick with one. Take therapy