Ladies... I finally found it!
We've been to Couples 3 times now and it seems every trip I have a new hair "product" to combat the humidity in Jamaica. Honestly, nothing has worked so far but I do believe I have found it! I'm in Toronto and July and August are very humid. I tried a product called "3 Day Straight" by John Freida that I got at the drugstore. Amazing! I even went to the gym and worked out for 2.5 hours and my hair did not frizz or curl.
I know this is often a topic on the board so I thought I would share!