I had the same problem and was on chat with Acer support when they asked if my stylus had a spare tip. I pulled on the tip to see if it was removable and noticed it had some springiness in it, and it started working properly. Apparently a lot of these styluses ship stuck in the active position, and when pulling on the tip it fixed itself. :-) Try pulling gently on the stylus tip and then jiggling it in and out a few times (how's that for a technical term) to loosen it up, and it should work fine. The opposite end works as an eraser.

You shouldn't have to use more than a light touch with the stylus. I'm betting when they stress test them or the heat from shipping may cause them to get stuck pressed in, and doing the above loosens it up and gets it working right. The stylus is pressure-sensitive.

Bigbootygothgf said:

I'm still having the problem you were having and I contacted support and they basically went "yeah sucks nothing we can do." I tried doing what y'all said you did and it didn't work. Please help. 

I know this is an old thread, but if you're still having this problem the s-pen from a note 4 or 3 works with the Acer spin much better then the one that came with it. I just got a used Acer off ebay and the included stylus was doing the same thing. Had an old s-pen tried that and it works as intended. Doesn't interact with the screen until it makes contact. Of course the button on the s-pen does nothing.