anyone have this issue- i never noticed it before now...

when i run the first few things through my green star juicer- it's fine.
but soon it starts to squeal- like this constant whine and instead of juice, i get foam. i guess the gears aren't working properly- fiber doesn't really come out either- so maybe it the gears just get overloaded and not emptying- er... anyway. green foam is no good!

so, new gears or new juicer?