I've used this product now for just under a year and have noticed that my strings have stayed fresh sounding for double the amount they used to before. Just wiping the strings with a cloth with a bit of the product soaked in, and another wipe with a clean fabric after each session has worked great. My first bottle hasn't run out yet, but I ordered another bottle so I'll have some ready for when I do. If you want to save some money on buying strings, definitely try this one out.