Well, you simply unclip the support device and then clip your device... really a strange request... here you will find your manual because Garmin without providing the model is useless
You need to use a very thin object and slide it under the suction cup until it reaches the middle of it; when the air is released from the middle of the suction cup to the outside, the suction cup will come off.
piquesous
Contributor
Without photos of the problem, it will be difficult to say anything. Because I don't think his problem comes from the suction cup that stays "stuck." He mentions having clipped a part in reverse.