Why is my MacBook Pro charging at a trickle level?

Ok, here is the story:

Day 1. I spill a full glass of water on top of my **closed**, powered-down, but plugged-in macbook. I have a case on it, but I'm sure it trickled down into the DC-in board and it pooled around the bottom of the macbook.

I quickly unplugged and dried the thing. I put it on rice, and set up a small space-heater about 4 feet away to blow warm air on it.

Day 2. I try to turn it on (24 hours after spill). No luck. Continue to dry it by opening the bottom up, and setting it up like an air tunnel, blowing continuous warm air on it.

Day 3. 48 hours - the must be dry as a bone. Still will not turn on. I plug in the charger to see what happens - and I see a breif flashing amber, then nothing.

Day 4. I take it to Apple. They hear me say 'water damage' and they say '450 bucks'... but we'll look at it for a second. The girl does a quick SMC reset, plugs it in, light goes green, and it turns on!

Day 5. I notice that my charger cable has actually been dim green all along - never bright green. (hence, trickle charge).

I order a DC-in from ifixit, I install it (I feel good about that process). But still, we're at a trickle charge.

I also soaked and dried the previous DC-in with alcohol, and tested that. And I soaked and cleaned my logic board some. There seems to be some black 'charring' on the teeth of a connector just above the DC-in board.

Is there any solution besides a new logic board? Should I clean it more thoroughly?

[OH, also. I've troubleshooted the charger... it works on other computers fine.. and working adapters show the same dim green light on my computer. ]

Thanks for your help!

Keith