What's the best way to clean the CD/DVD player & disc?

Some people use a ‘cleaner CD/DVD disc’ to clean their CD/DVD player. As for the CD/DVD disc itself, they say you have to use microfiber cloth or something like that. Are these methods really effective? I just want to be sure as to the right or proper way to clean the CD/DVD player & disc. After some time, the slot & disc gather dust which could disrupt the playback quality of the CD/DVD.

Back then, we just used an alcohol-based solution to clean the ‘head’ of the cassette player after a certain playing hours of the audio/video cassette. Very straightforward.