Sharing a bathroom with two roommates taught me that anything left wet for more than an hour starts smelling like a forgotten gym bag. Every sponge, every brush, every tool — if it doesn't dry quickly, it gets funky. Took me a full year of tossing moldy products before I landed on stuff that actually survives humid, poorly-ventilated shared bathrooms. If your shower situation involves other people's wet towels draped over everything, start here.