We are sometimes used to "close our eyes" in front of the bathroom grouts; it seems that we do not want to be conscious about the importance of our health.
Shower room, due to the umidity caused by steam, it is a perfect environment for the mold growing. In some cases, these spores may be cause allergy, breathing issues and skin diseases.
So, why would we take this risk?
All you need to do is remove the grouts accurately and clean the spaces between the tailes; at this point, we regrout the shower base and walls.
After a tough job, here is your nice and clean shower room. Now you do not have " close your eyes" anymore.