Strings seem to lose power? Too slippery? Rough strings become smooth?
I have invented a device to rough the surface on the polyester and nylon strings to improve spin. It is described in details in below website.
www.tennisspinmaker.comOr in Google type in “tennis spin maker”.
I find that most strings are too slippery when they are new, and some strings with rough surface such as “Structured String” become slippery too after a short while. In both cases, the strings do not grasp the balls very well.
I am a 5.0 player and use it for all of my strings. The device is hand-made and had polished. Many players are using it too. See their feedback on the above website.
