Cleaning a fiberglass shower can seem like a daunting task. Fiberglass showers are strong and durable, but over time they pick up soap scum and mineral deposits that make them appear dull and dirty. Harsh abrasive cleaners are not an option for fiberglass since they scratch the surface, permanently dulling and damaging the appearance. Using a squeegee after each shower will prevent much of the soap scum and minerals from forming deposits, but when cleaning becomes necessary, use these techniques to restore your fiberglass shower to its original appearance and keep it that way.