dielectric grease in card reader slot?

Water got into the card reader slot on my ff and now it is corroded. Remarkably it still works. I'm thinking about putting some dielectric grease in there to stop further corrosion, but I'm not sure if that is a good idea. Has anyone tried that?

I did see the Inkeeper suggest putting grease in the slot in this thread but I'm wondering if anyone has actually done it.
http://www.norcalkayakanglers.com/index.php?topic=89094.msg1019332#msg1019332

I might try putting some grease in a microSD card holder that I put into my computer as a test to see if works in general.

FYI I had the slot covered with electrical tape but some water still got in there. I should have opened it to check periodically.

First, start with some contact cleaner.  CRC makes one that I like and is available at Lowes, Home Depot, Ace, and any auto parts store.  It evaporates easily, so you can go to down with it.  It'll help clean up some of the corrosion without damaging sensitive electronics.  Once you've cleaned it, then yes, dielectric grease is the way to go.  It won't harm the sd card or the reader.  If there's a water resistant door over the slot, apply some grease to the seal, too.

Thanks for the advice Tedski. I filled the slot full of grease and it's working perfectly.