Maybe your glasses frame sit too low on your face. You should have them raised to make them sit properly on your face. Just use your finger to take the pads and apply minimal force to move the nose pads in closer. Then your glasses frame will sit correctly on your face.
If the frames sit too high on your face, you should spread the nose pads to make your glasses frame sit lower on your face. Use your fingers to hold the pads and then apply minimal pressure to spread them apart. Then the nose pads will sit wider and your rimless glasses frame will sit properly on your face.