I have a Plextor 708A CD/DVD R/W drive that's been backing up office data onto DVD every day for three years now. Laterly, it has developed a problem whereby it won't recognize what's in the drive. The activity light just winks and winks. Sometimes it'll find the disk in half an hour, sometimes an hour, sometimes never. On cleaning the drive with a Memorex DVD drive-cleaning DVD, the drive works fine again for a week or two, and then develops the fault again.
Is it time for a new drive? Or does it just need cleaning?