Rotation problem

Unity Engine
1

My problem is: When i click(that’s when this runs) the object doesn’t only go up, which it should, it also goes a little right. What can it be?

	can = 1;
	transform.Rotate(0,0,3);
	yield WaitForSeconds(0.000001);
	transform.Rotate(0,0,3);
	yield WaitForSeconds(0.000001);
	transform.Rotate(0,0,3);
	yield WaitForSeconds(0.000001);
	transform.Rotate(0,0,3);
	yield WaitForSeconds(0.000001);
	transform.Rotate(0,0,3);
	yield WaitForSeconds(0.000001);
	transform.Rotate(0,0,3);
	yield WaitForSeconds(0.1);
	transform.Rotate(0,0,-3);
	yield WaitForSeconds(0.0001);
	transform.Rotate(0,0,-3);
	yield WaitForSeconds(0.0001);
	transform.Rotate(0,0,-3);
	yield WaitForSeconds(0.0001);
	transform.Rotate(0,0,-3);
	yield WaitForSeconds(0.0001);
	transform.Rotate(0,0,-3);
	yield WaitForSeconds(0.0001);
	transform.Rotate(0,0,-3);
	can = 0;
2

how much is a “little”… my gut would be “floating point error” given that rotations are handled by Quaternions and those euler angle components will be converted before being applied…

3

the gun, before today was shooting(it went up, and back down to its starting pos)

today, whats however, it goes a less up and down, and it goes 1 or 2 rotations to the right