Hi and welcome to the forum
If device manager reports "This device is working properly" this means only that the drive is correctly recognized by the operative system but the drive can be also not working correctly in all its parts.
Because of the drive has two separate lasers, one for CD and another for DVD, it is possible that the DVD laser is damaged. If this happen, the drive is still able to work correctly with CD, but of course not with DVD.
If the DVD laser is damaged, however, the drive is not able to use at all any DVD (both pressed and burned discs), i.e. is not able to recognize DVD. If you have problems only with reading DVD but not with writing them, then the DVD laser is working properly.
To clean a drive there are two methods: using a cleaning kit (there are many available in stores) or opening the drive and cleaning lens by yourself.
Bear in mind that if the drive is still under warranty, opening it will void warranty