Just got mine today and the light does not work. Also who the hell puts a sticker on the top where the buttons are…using water on the edges worked after forever lol.
Edit I got the light to work after taking the top off and reseating the clip cable. Going to see how the air volume is since the fan is weird. 
Ugh, I’m sorry. Please reach out to Woot! Customer Service. To speed things up, let them know if you prefer a return/refund or a replacement (if possible).
Please allow 24-48h for them to respond.
Browser: Use the Woot! Customer Service form.
Woot! App: Choose Account from the bottom navigation and then Support.
Self-Return: Items without Li-Ion batteries can be self-returned within 30 days. Go to your Order Details to get started. The return label will be emailed from UPS.
Note: Woot! Customer Service replies go to the email address on your Woot! account, not your Amazon login email if used/different.
I ordered 2 and received them today before I saw your post. I understand why they’d place the sticker where they chose… They really, really don’t want us to start these until after the bag is removed from the filter. Really! But a less sticky sticker would be appreciated.
Anyway, I started at a corner, slowly. It ripped. Ugh. I went to the next 3 corners, one at a time, and pulled upward and toward the center, slowly, until I met the max resistance from the adhesive. Patience was my friend. The 2nd one was much easier, no doubt because of the mad skills I acquired with unstickering the first one.
Hope this helps others who purchase this!
You got lucky with the sticker I tried the corner technique and It just ripped every time or the top of the sticker came off but left the sticky behind. I just screw it and got some goo gone and warm water. 
No problem removing sticker. I pulled a little on top right left. Then went to bottom left and pulled slowly upward. The result was flawless. I plugged in and works great. I use air purifiers all the time due to my lungs. It seems to push out great for this compact size. So far, very happy
Lucky! Compared to OP and me, at least. My 1st one was in about 47 sticky little pieces. Wrecked my manicure, but it all came off… Eventually With the 2nd machine I purchased it went much more smoothly, but not like yours did.
Otherwise, I’m also very happy with mine! I’ve been sleeping better since plugging it in next to the bed.
I just felt the resistance on it therefore, I pulled a little on each top corner. Knowing it was strong stick on top telling me that hat they slap on sticker with more pressure on top. Then went to bottom corner pulling up slowly and felt less resistance and continued slowly upward and if it felt like it was going to rip I just waited and pulled again upward towards right from left . Maybe cause I’m use to pulling off these horrible things on other items I got a knack lol hope it helps everyone to get it off.