Sticky door locks

[akuma_supreme]

So my much-loved and up until now bullet-proof 2003 Civic EX coupe has now developed a pair of finicky door-locks.  Most times now either one or both door locks will not open with the key fob.  They will open if I use the key, and the passenger side will pretty reliably lock or unlock with the power door-lock button inside the car (the driver's side door will not open or close with the power switch).

Here's the weird part though.  Every morning, both doors open and close like a champ- even with the key-fob.  The problem only seems to manifest when it has warmed up outside, or when the car has been driven for awhile. 

I'm really loathe to spend the $200-$300 a dealership would charge to fix it, since it is more of a nuisance than anything else.  I'm thinking about picking up a Hayne's manual and attempting it myself.  I've done some work on other cars ( I've replaced brake pads, a clutch cylinder, and a radiator) but I've never done electrical before.

So what do the rest of you guys think?

[VTEC_Inside]

If they are like the RSX locks (and they probably are) then they are part of the latch assembly. Try hosing them down with grease for starters, maybe some of it will work in there where it needs to be.

[akuma_supreme]

If they are like the RSX locks (and they probably are) then they are part of the latch assembly. Try hosing them down with grease for starters, maybe some of it will work in there where it needs to be.

By latch assembly, do you mean the mechanism where the door actually clamps onto the body frame (ie door-sill) or the mechanism behind the flipper handles on the interior and exterior of the door, or both?

[VTEC_Inside]

By latch assembly, do you mean the mechanism where the door actually clamps onto the body frame (ie door-sill) or the mechanism behind the flipper handles on the interior and exterior of the door, or both?

The part in the door that grabs the body.