White nails usually look messy because of thick polish, streaky white formula, uneven nail shape, dry cuticles, polish flooding the cuticle, dull top coat, stains, chips, or lifted gel or acrylic. To make white nails look cleaner, use thin coats, file the shape evenly, clean the cuticle line, choose milky white if bright white looks harsh, seal the tips with top coat, and moisturize the cuticles.