Generally I stay 'dry' with the Rosco sheets only.
I only use the fluid when cleaning my right camera up after some major work. (I am talking about a broadcast TV camera with a $20 grand of Cannon lens on the front)
But I treat my stills the same.
With fluid, you use the smallest amount.
Here is a couple suppliers web pages:
http://www.videocraft.com.au/cat/ind...duct_id=163938
https://www.gettingcreative.com.au/p...roducts_id=239
JH