I like the red LED idea. In my house, with as many as six people using the dishwasher, I'm never sure if I'm loading dirty dishes in with clean ones that never got removed. I end up pulling the dishes out to examine them and then I decide if they're clean or dirty.
At this year's MD&M West show, lots of material suppliers are talking about new formulations for wearables and things that stick to the skin, whether it's adhesives, wound dressings, skin patches and other drug delivery devices, or medical electronics.
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