The top metal cover is easily removed after removing two small screws on the rear and gently prying up.
Here's a list of things I cleaned using denatured alcohol, q-tips and forceps.
- Both upper & lower disc clamps.
- Both upper & lower disc roller bars.
- Twin blue 'eyes' on bottom, aft of the hub.
- Laser lens.
I also took time to remove dried up grease from racks & sliders and relubed with LPS #1 I collected by spraying into a small glass jar. Definitely don't want to spray anything inside. I also used this to lubricate sliding points and pivots.
If the disc clamp isn't clean, the disc won't be held tightly and will slip, causing the tracking mechanism to lose its place. Many pick up discs by the center hole, thus transferring what's on their fingers to the clamp, which over time gets dirty with it. It's best to only hold the disc by the edges. To hold the clamp in place, I inserted a fine regular screwdriver into a side slot to gently wedge it into place. I was able to clean about 180° at a time, then rotate it, and clean the other half. Also important is the top clamp. Reach way in there with a q-tip held by the forceps.
The disc roller bars move the discs out of and into the cartridge. Over time, they'll become embedded with dust & dirt and loose their grip, causing a "clank" sound when in operation. Clean both from the front. You can rotate the upper roller from the top hole, next to the extend/retract gear. When that one's done, extend the mechanism further and you'll notice the lower roller bar rise up to join its mate. Put the player on its back, facing up and shine a light down inside. Clean both until deep black. I treated both with ReGrip since I had some, but any rubber/vinyl protectant will be suitable.
The laser lens is at the very back, on the right hand side of the hub when viewed from the front. Wet the q-tip with ethanol, then sling it to remove excess before wiping the lens off.
I cleaned and relubed as many sliding surfaces as I could reach with a drop of LPS1.
Result? Instant loading of discs with no slipping, slamming or clunking. Previously "unplayable" discs played with no issues.