Why Your Grout is Turning Orange and How to Kill the Bacteria for Good
The bacterial reality of orange grout stains Orange grout stains are primarily caused by Serratia marcescens, a species of Gram-negative bacteria that thrives in moist environments like showers and bathrooms. This biofilm feeds on fatty acids in soap scum and shampoo residue, producing a prodigiosin pigment that creates that stubborn orange or pink discoloration on […]
