What should a girl do who had been swallowing what was between her teeth for many years during Ramadan, and now she does not know the number of days she must make up from the Ramadan fast?

If a fasting person swallows food remnants caught between their teeth, in some cases, this invalidates the fast, while in other cases, it does not. Swallowing a small amount that is difficult to avoid does not invalidate the fast according to many scholars. However, intentionally swallowing a large amount that could have been avoided invalidates the fast according to the majority. If the swallowing occurred due to ignorance of the ruling, some scholars hold that this is an excuse and the fast is not invalidated.