Hi Kfhxo,
I have recently taken on Salon System Lash lift and think it's a brilliant lift. I almost always do the maximum timing and clingfilm over the top to keep the heat in and I find that it is really good.
It has a very eggy smell but I am assured that it is normal.
I had an issue with the smell and thought that it must have gone off ! I rang them , sent them back, they tested them and bingo a full set of lift sachets got sent back to me saying that they were completely fine. I was very impressed and am happy that I gave them a chance to resolve my concerns.
So ring customer services or email them and I hope you get the same chance of good customer care as I did.
Good Luck.