Its hard to tell, first off if any electrical device gets wet the first thing to do is placing the device into a cup of rice - about 2 or 3 hours later ist dust dry again.
i would wait until the speaker is dry then test again. if sound doesnt change to normal again the only thing you can do is open the phone and rearrange the speaker. but with most smartphones these days its cheaper to get any bluetooth speaker…
hopefully just dry will solve this problem