Any skipping issues with the Koala tube CD player?

Actas,
Sounds like you have already lost enough on this I say it't time to toss it and find a more reliable one. Life is too short to deal with unreliable gear and repair folks who don't know what they are doing.

Bojack, how sad to admit to this but you are right; I purchased this CDP as brand-new, used it only for about 1550 hours in 26 months to spin my CDs and it started to skip only two months after the expiration of its warranty. The Italian manufacturer still suggests me to send the CDP for the second time to the same repair person. Since obeying to this manufacturer's suggestion now seemed to me like committing the same mistake for the second time, at that point I decided to get some second opinions from the Audiogon people. Thanks to all, many people commented on my question. Today, I purchased "white lithium grease" to lubricate the rail on which the laser head is moving back-and-forth, if this doesn't solve the issue; then I will put the CDP back into its original box and store it out of my sight.

Billion thanks go to Davehrab.
WHITE LITHIUM GREASE!!!! Solved the problem. CDP is no longer skipping. Played 3 CDs from start to end; no skipping at all.

Here is the recipe:
I purchased white lithium grease for $5.49 at my local AutoZone. First cleaned the rail on which the laser-head is moving back-and-forth using pure isopropanol. I then applied a very conservative amount of that grease onto that metallic rail. Before connecting the CDP to the amplifier, I inserted a CD into the CDP and silently and quickly went through all the tracks, from the first to the lack track, several times. This ensured that the laser-head did travel through, almost, the entire length of that metallic rail and homogenized the white lithium grease I applied. Then connected the CDP to the amp, and enjoyed 3 of my favorite CDs very much without that quite annoying skipping which bugged me since a very long time.
Thanks again Davehrab!!!

Awesome news, Actas I suggest never listening to my posts ever again...ha ha!

Billion thanks go to Davehrab.
WHITE LITHIUM GREASE!!!! Solved the problem. CDP is no longer skipping. Played 3 CDs from start to end; no skipping at all.

OUTSTANDING ...

I have recommended this fix for a number of skipping CD players on various boards with great success for those who have tried it

This skipping problem usually occurs in much older players when the factory Lube eventually dries up on the rail and causes the laser sled to stall and lose lock with the data stream

I suspect the tube in your CD player is generating some extra heat under the cover and causing the Lube on the rail to premature dry up

Now you can sit back and enjoy your music
.