Complex sentence: Hence it is important to remove the worm slowly (over a period of weeks) by winding the tail of the worm onto a stick (say, a matchstick), by a few centimetres each day.
Split into simpler sentences: Hence it is important to remove the worm slowly (over a period of weeks). This is typically undertaken by winding the worm onto a stick (say, a matchstick), by a few centimetres each day.