Should I clean FDS games with a microfiber cloth?

[boye]

Exactly what it says on the tin. I'm getting Error 27 on my games, and although I managed to coax Castevania into working by retrying again and again, it only worked once for my Zelda disk, so now I'm thinking about cleaning the disks.

[maffatil]

Probably not the best idea to do that because the disks are some of the most fragile things I've ever seen. Error 27 is a calibration issue so that's what needs to be done. When I replaced the belt in my original disk system I followed this video: https://www.youtube.com/watch?v=fOY1G3Sg11Q  At around the 23 min mark he starts showing how to calibrate it. I don't know if this is technically the best/right way to do it, but it worked for me.
There's also this guide as well: http://www.famicomdisksystem.com/tutorials/fds-repair-mod/belt-replacement-adjustment/  but it didn't work for me so I don't know if you'd have success with it. Really it all comes down to if you're down for taking the thing apart.

I'll leave this here too just so you have a list of the errors: https://www.famicomworld.com/forum/index.php?topic=7142.0