How to fix Unrecognised Disc (not tapping cover)

Hi all of you,

I still have a problem with Unrecognised Disc drive in Ps4 Slim.

OK, tapping cover helping in this issue, (now I am using my ps4 Vertically to read the disc and after that I put console in normal position and it works perfect)

What cousing the problem? Is a dirt/dust or magnet to catch and put disc in right position ?

OK, I can put my console vertically permanently but I think it's not a long term fix.

Console has got stickers and haven't been disassembled but haven't got warranty (2 years old) (only high cover was removed for cleaning vent from dust)

Is it a easy problem to remove? Give me advice :)

Thanks for your reply and propositions!

Matt :)