Definitely use PhotoFlo. I always dipped two clean fingers in the PhotoFlo solution and wiped 35mm and 120 film before hanging to dry, but I never needed to do that on sheet film (4x5 or 8x10). After the PhotoFlo dip I simply hung the sheet by one corner using a spring clothes pin, adding another clothespin on the bottom corner, and leaving them to dry overnight.
This worked for me for well over forty years, with never a dust speck or streak on any negative.