Product review (5 stars): These ARE the best thing since sliced bread!!
I cannot speak highly enough of the Dishwasher Alert!  I buy them 5 or 6 at a time because I give them to everybody, plus I want to make sure I have an extra one on hand in case my current dishwasher dies and has to be replaced.

The one on my dishwasher has been there for about 7 years.  It sticks in place perfectly, so you don't have to worry about it coming loose.  If you have more than one person in your house, and even if it is just you and you are starting to get forgetful, you will find this to be an invaluable little tool!  When you turn on the dishwasher, just slide it to 'clean' and when you put away the clean dishes slide it back to 'dirty'.  It becomes a habit, and that is all you have to do.

I just gave away my last spare so I'm here looking for several more to have in stock.  For the price it is more than a steal, and that's why I buy so many at a time because they are great to share with others.