I use the leftover peels to create a fresh-smelling white vinegar cleaner by placing the peels in a mason jar and covering them with white vinegar. Allow to sit for 1-4 weeks. Strain and use as a general cleaner. I throw this in the bottom of my dishwasher to help my dishes come out crystal clear.
Fermented lemonade can be enjoyed by itself or combined with homemade kombucha or water kefir.