The fastest way to ruin white sneakers is to treat “white” as the cleaning instruction. Color tells you almost nothing about what the upper can tolerate. Leather, mesh, canvas and suede respond differently to water, abrasion and cleaning chemicals.
Do the least aggressive step before adding liquid
Nike recommends brushing off loose dirt before using a cleaning solution. That reduces the amount of grit being rubbed into the upper once the material becomes damp.
Use mild cleaning and light pressure
Leather is durable but its finish can be damaged by aggressive scrubbing and harsh chemicals. Nike recommends a mild solution and gentle cleaning, with leather conditioner as an optional follow-up for appropriate leather.
Avoid bleach and scrubbing against the structure
For knit and mesh shoes, Nike recommends mild soapy water and gentle brushing in the direction of the knit. Strong chemicals can weaken or discolor lightweight fibers.
It can tolerate more—but test before escalating
Canvas generally handles water better than suede and some leather finishes. White canvas can sometimes tolerate stronger whitening methods, but follow the shoe maker’s instructions and avoid transferring a method designed for canvas onto mixed-material shoes.
Water is not your first move
Nike’s suede-care guidance recommends a suede brush and eraser for surface dirt and scuffs, with more targeted treatment for stubborn stains. Suede absorbs moisture easily and needs more cautious handling.
Skip high heat
Air-dry sneakers completely before wearing them again. Heat can deform components, damage adhesives or change materials. Remove laces and insoles when appropriate so separate parts can dry properly.
Read the upper before choosing the cleaner
White leather, white canvas and white suede can look similar from across the room. Up close, they are different maintenance problems. Material first, stain second, cleaner third.