My iPhone was flooded by water,and the Compass does not work

My iphone was flooded by a little water,and the Compass does not work。

open the Compass ，the compass going round in circles，and sometimes the compass display “ Compass interference”

the location services can work。

how can i do？

The following is a Chinese description：

我的手机进水了，少量进水，能正常开机，但是指南针不行，指南针的指针会在转圈圈，其他手机都正常（没有磁场干扰），偶尔会显示指南针干扰，定位正常的。是不是陀螺仪坏了？