Who comes up with those random national holidays?Mike finds out from Holly McGuire, Editor in Chief at Chase’s Calendar of Events, and Marlo Anderson, Founder of National Day Calendar.com.  How long should you keep a toothbrush? And, how dirty are they?Mike gets answers from Kimberly Harms, D.D.S., The Dental Mediator.How do navigation apps work? Are they watching you? And, how do they calculate your ETA?Mike puts questions to Mike Wuerthele at Apple Insider. Got questions? Email Mike at ivegotquestions@audacy.com