Spark plug help

[Xplat]

Alright, Just a quick question.

I had a leaky fuel injector code so I got my all four fuel injectors cleaned only one was leaking. I changed the oil and when I went to check the spark plugs I saw they were carbon fouled. No biggy I thought I'll just replace em.


But once I got to the 4th spark plug I found this weird oxidation / white deposit.

Here's a pic.

http://img31.imageshack.us/img31/9551/sdc10555l.jpg


http://img651.imageshack.us/img651/2015/sdc10554e.jpg

I'm replacing the spark plugs... but what could have caused that, and should I be worried?

EDIT: Sorry about the massive pictures.

Also, I wanted to ask I see this black gunky stuff through the spark plug hole. Is there a product I could use to clean that out? I think that's the combustion chamber right? I vaguely remember there being something similar to seafoam that was better recommended. I think it was a GM product though.

[nrg]

water caused that.
looks like you're running alittle rich too.

if you're running sr20, then run step colder. bkr7e ngk (6097) plugs. they're already pre gapped to .028. just buy and drop them in.

if ka, just run a step colder than stock.

[slider2828]

Yeah that ish is water.... but its ONTOP of the plugs.... Why does your spark plug well have water in it? weird.....

That just looks really really rich... Especially if that black stuff is kinda sticky, meaning it sticks to a paper towel a little when trying to wipe..