I have been doing the quick and easy fajitas and pineapple salsa for my shows lately and it has been a hit. However, my last show on Tuesday, the salad choppers did not work as well as before. Usually the salsa is almost liquid and the chicken is well shredded. There were still chunks left in the salsa and I had a hard time chopping the chicken. They worked ok but not like they used to. I got the with KE so they are not that old. Any suggestions?