By the time you clean things up, the radio should have performed a "reset",
so it
should be good to go. If it still doesn't work,

One time when I had to clean up corrosion in my DX-392, it acted crazy at the
beginning. So I did what I was instructed to do when replacing my Casio watch's
battery: With the AA cells out, short their positive and negative contacts to
each other for a few seconds.

Sometimes, just putting the cells in, then out, then back in will smooth out
operation, too.

Even with above, though, FM was slow to lock up after tuning. During several
days, it got better and better to where it became normal. Even then, noise from
my computer or its monitor sometimes causes the FM frequency to shift slightly.

By the way... If you have another SW receiver to listen to WWV with, or an
accurate timepiece, seat the last AA on the hour. Then your clock seconds will
be in sync -- at least for a while. :-)

Bill, K5BY