Thanks for sharing this. It was so useful and helpful. I’ve learned another way of cleaning tile and grout. Just like yours, Austral Cleaning gave me some ideas and tips on how to keep our tiles clean longer. So, here it is, when your tile grout is completely clean, keeps it looking fresh and new by applying a coat or two of grout sealer. There are various types of grout sealers available for different uses, such as floors or bathroom tile. Make sure you purchase the correct type for the room you'll be applying it to. Reapply the grout sealer at least once a year, or as necessary.
I hope it can help you somehow. Thanks and God Bless!