What markers can you use to write on cds with?

You can use permanent markers or specially designed CD/DVD markers to write on CDs. Permanent markers, such as Sharpies, are common, but it's important to use ones that are water-based and non-toxic to avoid damaging the disc. Avoid using regular ink pens or highlighters, as they can smear or damage the surface. Always write on the label side, as writing on the bottom can affect playback.