Problems with BDs, not complete readable anymore ?

[Gloster]

BDs are very sensitive for fingerprints or other impurities. Not all videos readable anymore ...

It does help : Use one way soft cloth for cleaning screens + 2 Drops Dishwashing detergent (as you did use for cleaning your LPs) + hand warm water.
Use the soft cloth + the water (very wet, as you would clean a dinner plate.
Wash up the BD with clean warm water, same temperature.
Dry the BD with a kitchen paper towel.
I only press lightly the BD on the paper, no wishing. But all water drops must be removed.
Check whether all impurities are removed and the BD is totally dry and no "white" resistance applied.

I have over 500 self recorded BDs, and if the pollution was the BD reading problem, it could be solved, by the given cleaning process.

[lingyi]

If you're getting fingerprints or other marks on the read surface of your disks, you're very poorly handling or storing your discs.

Blu-Ray, UHD and DVD discs are very robust with the write/read layer sandwiched between a top and bottom polycarbonate layer, unlike CDs where there is only a bottom polycarbonate layer. It would take a very powerful solvent such a acetone, ammonia or possibly >70% isopropyl alcohol to to possibly dissolve the adhesive binding.

As for cleaning, your advise is sound, but not the only and possibly best cleaning method. Isopropyl rubbing alcohol, usually 70% or less or non-ammonia window cleaner may better cut through oil based smudges. Discussed in detail here: https://forum.videohelp.com/threads/311971-cleaning-dvd-s

Not mentioned is to always rub in straight, not circular strokes as data is written in concentretic rings from the inside out. Circular micro scratches are more likely to cause read errors than those that follow the tracks.

[johns0]

Sounds like your blue-ray reader is getting is at fault,I've had discs that haven't been used for years and still read with no issues.

[SmurfRecorder]

Water with dishwashing liquid is good. I always clean DVDs and glasses this way, but I haven’t tried it on Blu‑ray yet.

[TimA-C]

Have you tried multiple blu-ray players and/or drives? I still swear by (as opposed to swearing at) my cleaning cd(s) with the little brushes embedded on the playing surface.

[lingyi]

Have you tried multiple blu-ray players and/or drives? I still swear by (as opposed to swearing at) my cleaning cd(s) with the little brushes embedded on the playing surface.

To be clear. The disc with brushes is to clean the player/drive lens, not the disc itself.

[lingyi]

If there are smokers/vapers in the house, that can cause particulates to stick to the disc.

Ultimately, whatever the reason for the discs requiring cleaning and no matter what cleaning method is used, IMO, there's little reason to continue to use physical discs today. RIP them to a hard drive/SSD and put away your player/drive. Even with the high prices today, it's still just a few dollars per disc to store them on a hard drive/SSD.

[TimA-C]

Have you tried multiple blu-ray players and/or drives? I still swear by (as opposed to swearing at) my cleaning cd(s) with the little brushes embedded on the playing surface.

To be clear. The disc with brushes is to clean the player/drive lens, not the disc itself.

No sh*t, Sherlock!

Ok. So we're going to be patronising, are we? Right. If a disc isn't being read then a) it could be that the disc is dirty or damaged, OR b) it could be that the drive itself is dirty or damaged . . . ! I was just asking if the OP had eliminated that possibility before throwing all of their eggs into that particular basket.

Anyway, good luck with your obvious need to feel superior . . . although I suspect you're probably going to experience multiple failures in that regard as well.

[lingyi]

Clarifying for those who may not be aware that lens cleaning discs are available or even if the player/drive lens can (sometimes needs to) be cleaned, especially since optical disc/drive use is on a decline. You've been here over 20 years, which means you have a lot more experience and knowledge than someone who wasn't even born when you joined.

Edit: There's a joke that just because I man thinks or knows something, means others know what he meant. And yes, I'm guilty of that sometimes! ;-p