Its is a common mistake to force your spot in pirouettes. Much like other steps in ballet technique where you should engage your muscles, not tense them, to maintain a position, your spot is no different. If you tense your neck and thrash your head around in an effort to make an “active” spot, it will only work against you, causing you to lose your balance.
Improve your pirouettes by keeping a loose neck and allow your head to move smoothly and quick around as you spot.