Earpiece sound is fuzzy after screen replacement.
I recently replaced the screen in my iPhone 5s. The repair went smoothly, thanks to iFixit's excellent guide. However, now the sound in the earpiece is very fuzzy. The speaker function works fine, just the earpiece. Any ideas as to what I might have done to cause this upon reassembly, and any thoughts on a fix. Might have I damaged the earpiece speaker and need to replace it?
Thanks in advance.
Ed