Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Not Waterproof!
Review: I purchased two. One for my oven and one to put in a make it yourself solar oven. I wiped them with a soapy cloth as directed, but then rinsed them under running water. Both got water inside. I e-mailed the company and they responded quickly telling me that they are NOT waterproof. I was instructed to let them dry out and they would work fine. As far as accuracy, I placed them both in my home oven and they had a difference of about 5 degrees. Not too bad. Each line is 10 degrees. They're stable and easy to see.
