I have a Waring Pro juicer which used to work ok. Lately, after just a few carrots or pieces of fruit, it goes nuts, makes a really scary loud noise, knocks the lid off and practically leaps off the counter. The last episode sent my daughter screaming out of the room. I have not found any helpful info or advice. I would like to try to make it work but have also considered a new juicer that does a better job removing the pulp. So...seeking advice on fixing as well as possibly purchasing a new one.