It is the most frothy with leafy greens, or soft fruit like orange, or beets. With carrots, apples, celery, ginger, lemons, and similar things it does pretty well. I do cut things up especially cellery since the strings wrap around the cutter if I don't. Is there any way to know other than the amount of use of a cutter to determine if it is dull. Is there a performance test of some sort where you can be sure, or is it if you are asking it probably needs it. How does the Champion with a new cutter perform different from one with an oler cutter? Since I bought it used I don't know the history of the cutter.

I also have a question about wheat grass, everyone seems to say the Champion cannot do wheatgrass, but in the manual it says WHEAT GRASS JUICE
Type of Vegetable to Use: Freshly cut wheat
grass.
Preparing the Vegetables: Cut the grass in 2 inch
lengths, 6 cups of grass yield 6 ounces of juice.
Feeding Process: Juice the wheat grass a small
amount at a time, alternating with a small amount
of water, until all is juiced. For a tastier nutritious
drink, add 6 walnuts and four cups of carrot
juice.

Is that considered different than the wheat grass people talk about?