having a prob with grass building up on the deck of my jd-gt245--54 inch cut- have to put up on lift every second usage and remove the grass build up with scrapper blade or bar and hammer, it is packed so tight- first mower i have ever had that did this- any ideas on how to aliviate this . I am not cutting wet grass and the blades are sharp- cutting at 3.5 inches so not trapping it. got to be something that works. thanks-------this is getting to be pain in lower extremities