The answer to 'water heater clogged' is that a clogged water heater is a common issue that can be caused by sediment buildup, mineral deposits, or a blocked inlet or outlet. Symptoms include reduced hot water flow, strange noises from the tank, and longer heating times.
The solution typically involves flushing the tank to remove the clogged material. This is a DIY-friendly task that most homeowners can handle, but if the problem persists or you're uncomfortable working with the water heater, it's best to call a professional plumber for assistance.