What do you think about transdermal patches?
I think they're even better than transdermal sprays, you can wear the patch in the shower, and probably the delivery is even better. and more progressive during the day, its easiest to apply the desired quantity, prevents evaporation, clothes don't interfere with it, etc...
There's a lot of products selling in patches now:
EVRA: The contraceptive transdermal patch | SHPHK
EMEA Application For Nenad(R) (lisuride) Transdermal Patch And Subcutaneous Infusion For Parkinson's And Restless Leg Syndrome
Selegiline transdermal patch (Emsam) for major depressive disorder.(Product/service evaluation) - American Family Physician | Encyclopedia.com
Nicotine Patch -- familydoctor.org
Weight Loss Made Simple! | Patch It To Lose Weight! Lose Weight & Inches,Boost Energy,Curb Cravings,Stop Overeating,Reduce Body Fat, Enhance Muscle Tone, Improve Sleep, Clincally Proven
And there is various systems:
Transdermal systems education from 3M Drug
I think that technology could improve your products.
Could you make a "patched" version of Dermacrine?