Chalk should not make a difference. I've run some of those and have been hit or miss. Prob needs some adjusting or maybe sanding. Those paddles come really loose and not sure if they have a spring.
I use the red chalk I always see at walmart. I use it as a locater call and cut very aggressively with it when I want to fire them up. Last season was the first time using it and 5 birds fell to that call so it has a place in my vest this year.
Use 125 grit or 100 grit drag it down length of the paddle if ya think it's getting to slick even with chalk. What ever chalk ya get make sure it doesn't have wax additives in it! Forestry Supply use to have chalk rail road chalk to be exact was good stuff!