This is all terrifying, in my opinion. Like someone said regarding the baked goods, a child could buy one of those muffins and end up incredibly sick! And...well, this might seem nasty but I've been working with the public for years now. The customer is always right whether the customer is right or not (which, trust me, you were right). The manager should have been informed. It's not okay to get snippy with or around the customers, and it's not okay to make people sick...and it's REALLY not okay to not change your gloves after changing garbage. YUCK.