I have used Deoxit a couple of times and it has come thru each time! The first time was when a light just would not come on no matter what I tried, I put some Deoxit on the contacts and that was all it took. Last nite my tv remote just wouldn't work and I put some on the contacts and it started back working immediately! I use it on all my flashlight contacts and I really like this product as it really works!! I have both types and both are great!!