It is a great idea to lube the drawer but I can't say how.
The teeth do become very brittle. Mine broke all off unexpectedly and Theta replaced.
You can clean the lens with a fluffy Q-tip swab dipped in alcohol. Be careful though because the lens is suspended in a rubbery spider. If you press heavily on the lens it gets stuck too deeply in the spider and won't recognize CDs. Gently prying it out again seems to work OK. FWIW, cleaning my Data Basic II lens didn't help with skipping. Sending it back to Theta for some capacitors and a laser lube job solved that problem.
The teeth do become very brittle. Mine broke all off unexpectedly and Theta replaced.
You can clean the lens with a fluffy Q-tip swab dipped in alcohol. Be careful though because the lens is suspended in a rubbery spider. If you press heavily on the lens it gets stuck too deeply in the spider and won't recognize CDs. Gently prying it out again seems to work OK. FWIW, cleaning my Data Basic II lens didn't help with skipping. Sending it back to Theta for some capacitors and a laser lube job solved that problem.