I think it is better to get an actual lemon. I got a bag of about 6-7 lemons for $1.50. Then I cut a small slice and squeeze the juice into a little shot glass. Then I use my fingers to rub it all over my skin. I let it sit on there for 15 minutes. I also drink a little of the juice if there is some left over.
Before I started using the lemon two days ago, I had little bumps ALL over my face for several days I think which was some kind of adverse reaction to something. Using the lemon, the next day all those bumps were gone. I am not for certain if it was the lemon that helped, but I'm going to do this lemon thing every day for another week or two and see what results I get.