I have an older Jack Lalanne Juicer and have not had any problems. My mom has one that is a year old, my dad tried using it and said he had to push really hard and he didn't think it was working correctly.

I tried using it recently, and I had to push really hard to get things to go through. It is not efficient in extracting juice, and the pulp is quite juicy. I tried using my friend's--the exact same juicer, the exact same age, and it worked much better. I have looked closely at both juicers and can't figure out what the difference is!

Juicers - Jack Lalanne - Power Juicer (Stainless Steel)