50/50 worked fine most of the time but it didn't hold up as well on second dives especially below 40F.REII:Hey Pete;
I have been using 1/3 baby shampoo to 2/3 water and it works. Why did you switch to 100% shampoo? Did your mask still fog when it was watered down a little?
TOM
Besides Walter said to just use it straight!
Pete