[LAU] Recording accoustic guitar and string noise

Hi all, Regarding recording accoustic guitars (regular steel string and bass) is there a trick of some sort to minimize the sound of fingers sometimes swishing on the strings ? A bit of Finger Ease gets rid of some, but there's some of that sound that still creeps from time to time. Proper technique might not always be a solution. I'm more thinking along the lines of some notch filter but have no idea of the frequency (nor which filter in Ardour) to use, that is, if it's worth a try. I use a M-Audio microphone, which might not be the best, but then I'd need some convincing to believe that a top quality mic would actually do something concerning this. Perhaps better focus on the sound source. Any suggestions/ideas welcomed. Cheers.