I have a pouch for mine, think that helps a bit. Mine isn't that dirty at least

i cleaned mine once, but it did not seem to improve performance so i don't anymore

i do the occasionally shirt wiper if I need to watch a video or something though.

Once you get over it, it stays at a certain level of dirtiness and does not seem to get much worse

Airdust works great on mine

since putting on a decent screen protector i find it easy to clean. i just wipe my top or if at home use screen wipe. but i find it pretty clean.

Vikuiti ARMR200 screen protector and a Golla generation mobile pouch. Swapped from a Vikuiti DQC-160 because I like the matte finish on the ARMR200, tends to pick up less fingerprints (and increases the vibrance of my display).

One thing I've been doing when the earpiece speaker starts getting a lot of filth on it: I roll a q-tip in hand sanitizer gel (60% or greater alcohol content) and swab into the slit. Sounds dangerous but I've done it 20 times without any harm to my speaker. Just make sure you do it while the device is powered off, let it evaporate and wipe it off before turning it back on.

keep your hands and clothes clean

keep it in a clean pocket by itself

i used Apple cleaning cloth to clean mine everyday. I also made a custome bag for it like a pourch, it stay clean when i want to keep dust away feom my N900. What can i say i worked with a department full of macintosh. But i'm the only one that is not into iPHONE

I have a very nice Noreve case which I carry on a belt or inside cargo pant pockets. If I occasionally carry it "naked" inside pant pockets it gets very dirty and dusty very fast. I have the ARMR 200 too but wouldn't recommend it, mine was too long and it has a odd stain which ony disappears slowly by polishing it during use. So the center of the screen is quiet pretty because you touch it frequiently. But the edges stay uneven for a long time. I have mine about a month now and all edges are quite ugly still.

Use a cloth to clean the screen.

Use compressed air to clean everything else. I clean the earpiece hole almost every day with air.

Strange, my ARMR200 looks great all over. As most products these days, I guess theirs are hit or miss. My first DQC-160 was a piece of crap, never looked right and never settled. Same applied to my InvisibleShield, though... what a waste of money.