i have this problem.
i keep my wife at 99 to 100% daily. but even at 100% she is for days 'irritated'.
she still does her duty and pops voodoo on time, but i wonder why she is irritated and how to solve it.
a faithful husband

walk with her and she will be walking on clouds:)

You need to talk to her! If you just kiss her, you'll be at 100 percent romance, but she will still be irritated. There are two different parameters (romance and friendship), and the various options affect different parameters, some romance and some friendship.

affection and mood are independent mate
u need to max both to get card quick and both should Detroit to divorce you
talk to her or tell her a joke , the best ways to lift her mood up

a experienced husband

my wife never finds my "flat chest" joke amusing, yet i often insist on telling it to her twice in a row..

Talk control the Mood.
Kissing and flirting control the percentage.
Also, when doing this, start with the plain and move up to exquisite. Somehow your odds of success seem to improve.
Talk first before improving romance.

thanks all