Hi, can someone help me please? I've been given some guinot ionization gels by a friend who has closed her salon. I trained with them over 10 years ago and although i can remember my training very well (it was very thorough so will be with me for life!!) i haven't used the machine for many years. I only have a normal galvanic machine and wish to use them on my own skin (only got half a tube of each so don't want to share it with anybody but myself!) but i cant remember if i use it with negative (desincrustation) or positive (iontophoresis) or both, their machine has it pre-set so don't know. Any advice very gratefully recieved, thanks!