Greasing laser runners - how?

Hi,
I have a GSA-4081b burner… before a week or two it stopped reading & writing CDs/DVDs…
I’ve read a thread that says i should grease laser runners to “bring it back to life”, but i don’t know how and what to do exactly…

did anyone try it before and knows what to do or knows where can i find a solution to my problem?

Use a CD or DVD lens cleaner or open drive drive up and do it properly using a q-tip and Isopropanol…

how exactly do i open the disc?
i didn’t get you

The drive, not a disc!