Cleaning Algae, Dirt Of Heater

[mak]

How do I clean my heater? can I do it when I do a water change?

 

[PrairieSunflower]

I do, I use my sponge for the glass to clean it.

 

[fluttermoth]

Make sure the heater has been switched off for at least five minutes before you do anything to it, so it has time to cool down