At first it was just a few drops and when I dried them and put them in the sun (I was out at the time). They booted fine. Switched them off put them back in the pocket and in the bag...
then checked on them an hour or so later. And...the back of the 3ds standard size was wet to the touch and there was a layer of water on my 3ds XL on the L and R buttons and the cartridge slot. I didn't dare to try switching them on this time. Went back home. Bought rice on the way. Put the 3ds coated in rice in a large dish. And I am waiting...And hoping for the best...
Well it's the data from the standard 3ds I system transfered there...Yes I have that one since November 2011...while I bought the XL I system transfered to in December 2015...
So how will you know if it works if you don't try? Are you just not gonna play it anymore so you don't find out? It doesn't take that long for water to dry and evaporare.
That was before, because I was stressed (afraid of bricking), and then once I finished because I was super excited (because it went well and it was so cool). Now I'm afraid of clicking on the power button of my 3dses because I'm afraid of short circuits...
What you could have done was least open the system and cleaned with cloth and let the battery sit out in the sun for few hours and then it would probably been done faster than buying rice and sitting it in there.