If the strip doesn’t stick well to your skin, dampen your fingers and try to press the strip down against your nose.
If the strip is painful to remove, you may have left it on for too long. Dip a Q-tip in some water, and place the tip against one of the edges of the strip. This will dampen the adhesive. Try to get part of the tip under the strip. Once you are able to get a good grip on the strip, put the Q-tip away and try to peel the strip off again.
Avoid placing the strip too close to your eyes. The skin in that area is too sensitive and fragile for these strips.
If you put the strip on your forehead, start peeling from both sides and work your way towards the middle.