Spin Numbers Making my GC2 Irrelavant - Help

[cobig13]

After practicing on my GC2 for a couple thousand shots, I played outside this weekend and was surprised that all of my distances were 20+ yards short of my shots on the GC2. I'm assuming it comes from the unit under reading spin. I know there is a "mat effect" but it can't be this drastic can it?

I just hit my 34* 7 iron off of my Fiberbuilt mat. Below is a typical reading:

107mph ball speed
25.4* launch angle
2.2L Pull
4L Side spin
2774 back spin
164 yard carry

How can that spin be so low? Any suggestions?

[wbond]

That spin is way too low. You should be around 5.5-6k off a mat depending upon iron model. I would first really clean and scrape the grooves, it may look clean, but you may be surprised. Second, use a brand new premium ball and see if you get a difference in reading. 20yds is not a lot with a high launch low spin.

[Cklguy2013]

Cleaning the clubs is a good idea as suggested, I find that if you don't do that you start to get flyers after having hit inside for a while.

[cobig13]

Dirty club faces. You guys nailed it. Thanks!

[calcal168]

I would suggest swapping the flash if u have spare, it might be flash going to die and it reads spin low or error. Happens to me before