What to do if you spill milk on your iPhone 4?

I spilled milk on my iPhone. Now it's speakers are acting weird. At first it wouldn't let me adjust it's volume. Then I locked it and it let me adjust. But now the volume is very low. I'm very worried.

Fill a small bag with rice. Turn your phone off and completely cover it in the rice. Let it sit for about 2 days. Then take it out and it should be fine.

Rice absorbs moister.