For my applications perfectly ...

However, I use it more for my smartphone, my Kindle reader and my tablet. Every few days / weeks there is every now and then dirt residues, dust, fingerprints, etc. And when it too much and too unsightly, is then spray briefly. For this I use vials, which have become empty and I - have paid significantly more expensive - with content. The Refill will I certainly acquire more often - so every one to two years - for as long as you get probably stride toward :)