You're not supposed to use anything. What do you use them for? Most people use them to "take out the wax", but what they fail to realize is that ears are self cleaning and wax is a key element in that process.
In a healthy ear, wax is generated and is slowly pushed out of the ear canal naturally, catching a bunch of debris along the way.
Unless your ear is not healthy (and you do know for a fact that it doesn't generate wax, or generates too much, or accumulates the wax, etc...), then it requires no maintenance.
QTips not only carry a risk of injury to the ear drum, they also generally make things worse by compacting wax closer to the ear drum, like a piston.