Meguiars APC or APC+ can be used on interiors, including carpets. Can be bought by the gallon and diluted 10:1 for interior use. APC is foaming, APC+ is not, so which one to use depends on what additional equipment you'll use for maintenance. Not sure what it costs here in the Philippines, though.
Here's a link with short descriptions from Meguiars:
Meguiar's All Purpose Cleaners






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