Hi Veronica, the best thing you could do is redo the tile and have the tub resealed ,you could use mr ugly in Rockaway they do a great job. Kevin

Veronica,

Have the tub refinished and if you still like the tile, clean it or have it professionally cleaned.

If the tile is to be replaced, do that first and the tub refinishing would come last (don't want to drop a tile, tool, mastic, grout, etc. on your newly refinished tub)

You're welcome, happy to help!