If you persistently run out of hot water on bath night and you have a generous sized hot water heater that was inspected and deemed very functional, don't panic: you probably really don't need a new hot water heater just yet.
If you have two and three-year-olds in your house that are healthy, active and energetic and they enjoy playing in your basement - especially within the vicinity of the hot water heater, they are probably actually the problem. Especially if the shut off valve on the hot water heater is within 48 inches to the floor.
If you don't believe me, just go check your hot water heater.
Or you can come check mine.
Tip: check them before you attempt to use the shower.