Since few days my grabcad score is decreasing,please anyone tell me the reason behind it?
Accepted answer
Maybe someone un-liked a few of your models which they previously liked?
Did you delete any models from the library? That will remove all of their likes and points.
I'm not sure if the same loss of points occurs if a previously accepted, or upvoted answer is un-voted.
I wouldn't worry too much about losing a few points, just think of all the easy ways to increase the point count again.