DayWhite ACP whitening gel after you finished your treatment

[andrea26]

Hi guys,

I was just wondering, has anyone who finished their treatment carried on using the whitening gel with their trays? I have finished my treatment few months ago and run out of the gel, thinking of buying some more. What I would like to know, do you think it is safe to buy one from Ebay? I found it a bit expensive on their official website but found a cheaper one on ebay.
Thanks for your replies.