Detergents usually contain a combination of quality ingredients that are effective in removing dirt and stains from clothes. Some of the key ingredients in detergents that contribute to their cleaning power include surfactants, builders, enzymes, and bleach agents. Surfactants are compounds that lower the surface tension of water and allow it to penetrate fabrics, while builders help in softening water by removing mineral ions that can interfere with cleaning. Enzymes break down protein, starch, and fat stains while bleach agents remove color stains and brighten whites. Other ingredients can include fragrances, preservatives, and stabilizers.