Product review (5 stars): Only This Works for Stainless or Aluminum
Whats in YOUR dishwasher?  Stainless? Aluminum? Titanium? Brass? Copper?
If so - FORGET using a magnetic dishwasher indicator!
If you're not sure, CHECK with a magnet FIRST - then buy THIS one!
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See my customer photos - this sticks on the top edge of your cabinet mounted dishwasher, and in MOST cases, will fit UNDER the counter edge with the door closed without binding IF you mount it far forward.  Otherwise, you CAN stick it to the front surface of your dishwasher, but that's just a BIT more tacky.  CHECK first - cuz once you stick it, you're DONE!
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I did not have any problems with the little slider binding up - - and if it had, woulda been easy to remove it and trim it ever so slightly.  My wife loves it - we wish we'd found it LOADS ago!