Machine not emptying properly?

Hi I have have the machine 6 1/2 years and it has been working fine but for the last couple of months it has not always been draining properly. Normalyy put it on 5 but have tried other cycles and have even been wieghing washing incase i am over filling. have to empty 1/2 the load and go back to C again to dry them enough to hang out without puddles.