It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that once someone asked the Holy Prophet (peace and blessings be upon him) about the ruling if a mouse falls into ghee and dies. The Holy Prophet (peace and blessings be upon him) said: If the ghee is solid, then remove the part (where the mouse fell) and the ghee around it, and then use the remaining ghee. But if the ghee is in liquid form, then do not use it.