I just started a lawn mowing business in rochester ny. It has benn raining and the grass can get high. I mow once a week with a cub cadet 60 inch zero turn. I am getting some complaints from customers that I am leaving clumps of grass in yards. I discharge has a rubber gaurd on it. is this the problem? What can I do to fix this so I don't loose customers? i look at other yards that get mowed and mine look bad. Please help!!