I vaccuum the tank and change water ( about 50%) once a week. I wipe of the filter intakes if i cant vaccuum them clean and rinse out the filter media in tank water.
You shouldn't see any ammonia in an established tank, but you can measure nitrates, which I bet you will find to be high. Also, there are many things that you can not see And can not measure that will accumulate in your water and be unhealthy for the fish. I strongly recomend changing more water. (maybe 25%/week? 50%every other week? test it and see)
Its great that you have plenty of filter, but there are still things that a filter cant remove.
I never wpe my glass off and in most of my tanks dont have algae growing on it. For decorations I have rocks and driftwood, and i don't mind some green on them.
I wonder though....Since once a month wiping is enough for you to keep 'green' away, that's not what I'd call much algae at all.
If you changed more water more often, you might find less green... You would be removing a lot of the nutrients that the green needs in order to grow. Also reducing the amount of time the lights are on. No harm in 'wiping' I suppose, I just like to muck around in the tank as minimally as possible.
A live plant might help too.