A friend turned me on to this awesome nail "dryer" - it's not a brush or a spray, but an eye dropper that lets you put a little drop right on your finger, so you tilt your hand down when you apply it and it runs down the nail. No, it is not absolutely perfect, if you it won't dry your nails completely (especially if you put several coats on in a short period of time), but it does firm up the top coat so it will resist smudges until the polish is completely dry. I totally recommend it.