Plus, koala fingerprints, lobster pee and other hot facts.There are mysterious symbols inside your tee-shirt -- do you know what they mean? ELT reveals the secrets of The DaLaundry Code. Plus, lobsters pee from their faces, and other cocktail party fodder from our fact buddy exchange. Guests: Symbol whisperer John Langdon; Pascale Florant of GINETEX; Patrick A. Ayers of Vartest Labs.Thanks to laundry caller Ellen, Fran Kozen of Cornell University’s College of Human Ecology, and to our fact buddies Josh, Angela, Greg, Olivia, Chad, Kathryn, Rachel, Amber, Ivy and Lia.  Have a question that needs answering? Call the ELT Help Line #(833) RING ELT.To find a list of our sponsors and show-related promo codes, go to gimlet.media/OurAdvertisers