My friend who is an avid cook showed me this the other day. Cut the very tips of your citrus fruits off before putting them into a juicer. Instead of catching some of the liquid in the closed ends, the juice will squirt all the way through. Flip over and do it again. Nothing goes to waste.
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To get more juice out of a lemon, microwave it for 10 or 12 seconds and then roll it on the countertop.