There are a lot of wet-erase markers available. Here in Australia they're often sold a 'overhead projector pens'.

I've found the Staedtler Lumicolor non-permanent felt tip pens are OK for general use. My friends and I use them on laminated board games and the pens write clearly and erase well with water and a tissue. Although the ink can smear a bit when still wet.

The pens are sold here in craft stores and stationers, and have a superfine version. I've head that staedtler can be hard to find in the USA so you may have to check out a craft store or the web.

This is what they look like- staedtler(dot)com(dot)au / Lumocolor_non_permanent_universal_pen_au(dot)Staedtler