Mark the water level in your brine tank. before you start taking things apart.
While you're rinsing the brine tank out at least once a year... As long as you've in there, pull the brine assembly out of the brine well (the 4+" vertical tube inside the brine tank). The brine assembly will look something like this:
Make sure the slots on the bottom are all clean and open. Turn the assembly upside down and make sure the ball (check valve) inside the slotted brine pickup rolls freely. You should be able to hear it easily. Check for any other signs of obvious damage, and then reinstall. Use some diluted, unscented chlorox to sanitize the inside of the brine tank. Then reattach the brine tube to the fitting at the top of the assembly, add salt and water and you're back in business. Make certain the connection between the brine tube (the small diameter tube coming from the softener valve) and the brine assembly is a 100% seal - any leaks here will result in problems.
And while you're at it... trace that small diameter tube - the "brine tube" - all the way back to where it joins the softener valve and make sure you see no splits/crimps, etc. Many a service call for your softener can be avoided by this 30-second check.
Russ