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insulating it or turning down the target temp may help.
I don't ever touch my water heater. But I know that it is down on temperature.
An insulated 'blanket' around the water heater will also help save money.
You mean turn off the pilot altogether? If so, it will surely save energy cost.
If what you mean by "turning down the gas" is turning down the temperature on your water heater, then yes. If you're keeping a tank of water heated hotter than 120 degrees you're probably wasting money.
I'm not sure what you mean by turning down the gas. Turning down the temperature for the heater will save you money.