Sticky for only minutes then gives out - don't buy it

It was to replace a tape that we couldn't find which met our needs which was to stick a cell phone magnet to our car dash which the other tape did amazingly. This tape seemed strong at first but just seemed to stop sticking after about 1/2 hour, dropping onto the floor. I didn't even get to the point of putting my phone on it - it wouldn't even hold up the magnet. And the surface is perfect for it - very smooth plastic. I tried repeatedly but it very strangely starts off strong and then gives out. Oh and it also left a residue on the dash. Maybe if you just carpet tape, etc. then this might work but my purpose was to find something stronger and this wasn't it. I'd tell you the brand of tape that does work but there's no brand on it - we finally found it again, except for being ripped off with our $10 for this tape.

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