I need help keeping my staightened hair straight in a constantly humid environment! HELP!?

I live where it's constantly humid and the humidity can get up to atleast 80%. I've tried almost everything to try to keep my straightened hair straight and not curl back up when I'm outside. Any suggestions. I flat iron my hair.

I need help keeping my staightened hair straight in a constantly humid environment! HELP!?

Garnier Fructis Sleek and Shine.

I need help keeping my staightened hair straight in a constantly humid environment! HELP!?

This stuff called Silk helps and another product called texture keeps the hair smooth and not frizzy. I have thick hair and when it's hot a humid I used those two products.

I need help keeping my staightened hair straight in a constantly humid environment! HELP!?

do you use anything to protect it? like a heat styler? you need some product on your hair something that is humidity resistant..i would try the Sleek Look line by Matrix..or any professional product that helps straighten hair..don't sue anything from target/meijer/drugstores, etc...those are too drying and will make it worse..any other questions just email me...decbaby8303@yahoo.com