Lionel, Is it optical or is there a ball underneath? If the former, try re-installing the software. If the latter, take the ball out, carefully remove fluff and stuff from probably three rollers with care! Clean and replace ball. Use of clear meths should be OK. Coloured meths tends to leave a little deposit, but I don't think it would matter here. HTH Rick H -- <Please delete this line and everything below.> To unsub or change your email settings: //www.freelists.org/webpage/pctechtalk To access our Archives: http://groups.yahoo.com/group/PCTechTalk/messages/ //www.freelists.org/archives/pctechtalk/