ok I want to let ALL OF YOU using BRISA that are pulling your clients hands out of the lamp to STOP DOING THAT!
The Brisa lamps cure setting is 2 minutes. Not 1 min 45 seconds. 2 minutes. And everytime you pull the hand out, you are risking undercuring, and that increases the possibility of overexposure for your client, as well as service breakdown later.
Tell your clients to simply press down their fingers while in the lamp, and count to 10 with them. The sensation will pass, and they will be no worse for it.
Then check your application and make sure it isn't TOO thick. Applying TOO MUCH gel is no good either! UV light can only pass through the top most layer of your gel- if you apply too thickly, it won't fully cure, and then you will have MORE problems with service breakdown.
Whenever you are experiencing any problems, grab your Brisa DVD (it comes with the kits now) and watch it- I have been using it for 5 years now, and am up to my eyeballs in education, but I STILL pull out my workbooks and videos often to make sure I am still using my products correctly.