Anyone who had never owned a pet and reading this blog (can't imagine those two categories cross-sectioning, but perhaps, an animal lover who is in jail or something)...anyway, as i was was saying...errr....(starting over). Anyone who HAS owned a pet, knows that there is the un-fun part, which is, usually, dealing with 1) things that come out of their butts 2) things that have to do with their food after being eaten (clean up, or a mess) and 3) shedding (be it fur or in this case, feathers). Budgies, by far, are much, much less un-fun in this way than any dog or cat. while it would be ideal to clean the cage every day (just like for a cat owner, cleaning the litter box daily would be good..yeah right!), I suspect that once a week is pretty standard, and also, pretty acceptable. This doesn't apply to seed dishes-if they have only hulls in them, and no new seeds, or it is hard for the budgie to reach the seeds under spent hulls, the budgie could starve. So, seed dishes should be emptied and have new seed replaced daily.
I like the current set up for the bottom of the cage, having tried lots of "litter". The corn cob litter is safe for budgies, and looks ok (not that I spend a lot of time looking at it...). And because budgies have their favorite perches, and, favorite spots on the favorite perches, they tend to, er, accumulate "waste" in particular spots. I put timothy hay under those spots, so I can easily and quickly clean those areas, and not have to do a total cage change as often. Additionally, timothy hay smells good. Also, it can be pushed up against the edge of the cage, which can be hard to clean, and keep that from getting soiled.
So, if you've read this far, you're either 1) totally bored 2) as obsessed with budgies as I am, to the point where you are interested, even in their poop 3) one of those animal lovers in prison mentioned at the beginning or 4) all of these.