Just a couple of months ago I purchased some "wicking" synthetic t-shirts and fleece overshirts, and a Polarfleece jacket. They all say to NOT use fabric softener (because it may mess up the materials' wicking abilities).
Now, thinking about this, I realize that I have not used fabric softener on my cotton towels for years for precisely this same reason. I like towels to "instantly" suck water off my body when I am drying myself and fabric softener on towels inhibits this action.
Pondering upon this, a light came on! BINK! I have stopped using fabric softener on my cycling shorts and have noticed that the chamois in each keeps me much more dry.
I respectfully suggest you each try this and let me know if it works for you, especially with the upcoming "sweaty season."