Title: Cannot Properly clean the lid
Review: Just to put it out there, we clean our contigo mugs after everyuse, but there is a smell in the lid that won't go away. I've tried a small tooth brush to clean in the lid, but you can't get in there. we have 4 mugs and they all had this vile growth in the lid. [...]. as a coffee mug they work great, but they are a bacterial breeding ground.
Is this product review negative?