I used Kimony over grip. Kimony grip is very tacky when it is brand new.
I usually put two rackets inside the badminton bag. (But sometimes three rackets.) After playing with a new set of over grip for a few sessions (with each session lasting two hours), the grip loses its tackiness. I at least play twice a week, but sometimes four times a week.
Why the grip loses it tackiness so fast? I don't understand.
Why? Is it because
A) one grip rubbing against another grip
B) Dry hands
C) Kimony overgrip is too thin
D) It is normal to lose tackiness after a few sessions
E) none of the above
i use Toalson Ultra grip and it's very tacky on the first session, normal tacky the next 5-7 sessions, then becomes more dry than tacky, but OK for a few more, especially with some sweat on the handle.
RKEPs G09 are about to be delivered, but I believe the situation will be about the same with them.