Ceramic wall tile- ? Would appreciate any suggestions!

Try vinegar or SRL

What type of tile do you have? There are different solutions for different tiles. If it is a natural stone tile you would apply a gloss stone sealer for example.

😊

http://homeguides.sfgate.com/clean-restore-shine-bathroom-tiles-91360.html

Have you tried the Astonish products, they are cruelty free and just brilliant. Failing that you can use tile paint and repaint to which ever colour you choose or you can get tile transfers

Mix one part vinegar with one part liquid dishwashing soap. Spray it on the tile, then sprinkle a bit of baking soda on the damp area and scrub with a small bristle brush. Allow to sit for a few minutes, then rinse well. If the tile does not shine, then most likely, the finish is worn off, or the tile has aged to the point where it will no longer shine. You could try applying a coat of polycrylic over the tile...use the gloss version. Paint it on, and let it dry completely. Read the instructions to see what products can be used for cleaning, etc in the future. Since bath walls get a lot of abuse from soap scum, cleaning, etc...you may have to repeat this every couple of years to keep it shiny looking.

For ceramic tile, I would consider paste wax - car wax should be good because it's made to handle water well. If it's been cleaned a lot with abrasive cleaners, the finish may have been scrubbed off. :( In that case, I'd look into how to paint ceramic tile. It will hold for a few years while you decide how or if you should replace it. Wishing you the best!