Scrape the wall to remove any texture and to create a flat surface.
How to clean newly laid wall tiles.
Remove any remaining dust oils and grease from the wall with tsp tri sodium phosphate or an ammonia based cleanser.
When you re laying the tiles.
Run a dry cloth over the tiles to remove any leftover and dry the floor.
A damp microfibre mop is better than a wet mop for a streak free clean avoid the use of cotton and sponge mops.
The mop should grab the surface and lift off most daily grime with a little pressure.
Wash the tiles again with plain water to remove any remaining vinegar.
For a thorough clean use the miracle tile stone cleaner available from beaumont tiles with warm water and a damp microfibre mop.
Wipe over each tile individually using one smooth pass flip the sponge and make another pass.
Vacuum to remove dust.
You can add more vinegar to make the mixture stronger if needed.
Depending on the surface area you must cover use a mop or soft.
Mix 1 part white vinegar to 4 parts water in a bucket or large spray bottle.
I simply searched tile safety in the bathroom there is a section about tiles and how they must comply with australian safety regulations and that some imported tiles do not meet this compliance.
Just be absolutely sure before you have a huge re do job in your bathroom before you can be given a certificate of compliance.
It is important to rinse the sponge as you go to avoid leaving traces of mortar difficult to remove once dry.
Additional vinegar can be added for extra strength.
Patch any holes or cracks with spackling compound and sand the entire surface with medium grit sandpaper.
To use vinegar on porcelain or ceramic mix four parts water with one part white vinegar.
Wipe the tiles using a soft cloth dipped in the vinegar mixture.