Advise required on drive train lubing frequency

Where I live, 80% of my riding is on dry dusty or rocky single track. After a ride I have a lot of dust and grit on my chain, chain wheels, cassette and the small springs on the front and rear derailleurs.
Do I need to completely degrease and regrease these components after each ride ( I hope not as that will make it a chore to go out) or is it enough to wipe the grit off with a rag and then apply a little more lube to the chain? At the moment the chain and components still have the original factory lube on them. So far I've just wiped the grit off. I've only been out on 3 ~10Km rides since I got the bike but want to do the correct thing to ensure longevity on the components.
I've got a sample of that wax based dry lube (sorry the name escapes me now and I'm not near the bottle to check), would this be a better lube for my environment as opposed to a wet / sticky lube?
Do I need to completely degrease and regrease these components after each ride ( I hope not as that will make it a chore to go out) or is it enough to wipe the grit off with a rag and then apply a little more lube to the chain? At the moment the chain and components still have the original factory lube on them. So far I've just wiped the grit off. I've only been out on 3 ~10Km rides since I got the bike but want to do the correct thing to ensure longevity on the components.
I've got a sample of that wax based dry lube (sorry the name escapes me now and I'm not near the bottle to check), would this be a better lube for my environment as opposed to a wet / sticky lube?
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http://www.sheldonbrown.com/chains.html
Parktools :?:SheldonBrown
Although I'm fairly new to MTBing, I'd agree with you there, 5pudgun. As a kid I rode everywhere on a bike and hardly ever washed my bike, let alone re-lube it. And it was never de-greased. And it always worked fine. Sure, if you were to degrease and re-lube frequently the components would last a bit longer and would run a bit smoother, but I don't think they're likely to wear out quickly if you don't.
I don't blame the author at all for this question. It's something I have wondered but have come to the conclusion that I too have been worrying too much. I reckon there's a bit of "you scratch my back and I'll scratch yours" between maintenance product companies and the magazines when it comes to the magazines running maintenance features. Maybe I'm just cynical but unless you're competing seriously, alot of it is over-kill in my opinion and could end up putting you off why you got a bike in the first place - to ride and enjoy.
I agree with Miggins, it's easy to get sucked into over thinking / complicating things by marketing and magazine articles.
I've bought a new bike....ouch - result
Can I buy a new bike?...No - no result
You get over 6000 miles from a chain and cassette, offroad? Don't take this the wrong way but I find that pretty hard to credit.