From what I understand there are three different type of grooves ( U, V, and square groove). The square grooves are more forgiving in longer cut  grass such as the rough. These grooves allow for more moisture and grass to fill the groove therefore, allowing…

I care a towel that is wet on one end and use it to wipe down my clubs after each shot. If there is any build up of dirt, I soak them in warm water and scrub with a brush.