Xiaomi Canon Bluetooth speaker got wet under the rain

I recently left my speaker close to the window when it rained. After I realised that it got wet, I used a hairdryer to dry the device (with low heat) and left it unused for more than 24 hours.

When I tried using it, the sound quality has changed a lot. It sounds as though the speakers have been covered. Is there anything that I can do to fix the speaker? Could I continue to use the speaker? Will my warranty be able to cover for this damage?

Thanks!

The details of this device can be found here, from the official page [Xiaomi Round Bluetooth Speaker] : http://xiaomi-mi.com/speakers/bluetooth-...