Shower grout is notoriously difficult to clean, but using chemical cleaners like bleach can actually make the problem worse, according to cleaning experts. Leslie, founder of Lemon Grove Lane, warns that bleach can discolour or strip colour from grout, especially coloured grout, and can even weaken it, causing cracks and crumbling.
While bleach is known for killing surface mould and brightening lines, it fails to penetrate deeply enough to eradicate mould entirely. Because bleach is water-based, spores can thrive on the residual dampness and regrow. Repeated use can also cause yellowing or complete removal of grout.
A more effective approach involves using three non-toxic items: baking soda, hydrogen peroxide, and Castile soap. Hydrogen peroxide is a gentler disinfectant that destroys mould spores by damaging their essential proteins. Baking soda is abrasive and can work deep into grout, while Castile soap dissolves oils and soap scum.
To create a cleaning paste, mix hydrogen peroxide and baking soda in a bowl, then add Castile soap until a paste forms. Apply the paste to grout lines on shower floors and walls, leave for 10 minutes, then scrub with a stiff-bristled brush. Rinse thoroughly and buff dry with a clean cloth for a gleaming shower without bleach.
