Conventional cleaning products, those that we normally buy to wash the floor , are certainly not suitable for lightening the joints.
Below we suggest the most effective tip to lighten black grout and clean the floor.
All you need is some baking soda, a sponge, and some water.
Pour baking soda into a bowl, add water and pour onto the floor. Scrub with the sponge, applying a little force between the joints, then mop as you normally do.
There is no need to use a cleaning product. Conversely, using a little vinegar as an alternative to floor detergent will disinfect surfaces and scent the house.
You will see that with this simple tip, the floor joints will be like new.