Speaker Issues - Motorola Droid RAZR

The speaker on my Razr is no longer working, it had been intermittent for a while (working for a day, then not working for a few) but it hasn't worked at all this week. Occasionally a hard reboot (power button plus volume down) will make it start working again but its also been a while since that has worked.
I've already exchanged one Razr for a speaker not working and Amazon won't exchange the phone again for the same issue. Instead they want to offer me credit towards a different phone. Since I got the Razr during the penny sale, that doesn't help me much.
Has anyone seen or heard of this issue before and are there any fixes? Do you know if its a software or a hardware problem? I love the phone, its just very frustrating that the speaker doesn't work.

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I may have the same problem..
Is it only the back speaker which is down ?
Sorry but so far my only (and no-efficient) solution was hard reboot

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Yeah, its the rear speaker. Hard booting sometimes works but not always. Seems more like a hardware issue because I can tap the speaker when it stops working and it will sometimes start working again.

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Having the same issue, the main speaker sometimes gets turned off (especially when micro usb is inserted, and then pulled out).
What usually helps is to gently press on the silver MOTOROLA logo on the top of the phone (in the middle of the logo).
So looks like when inserting/ pulling out micro usb cable, somehow something gets moved inside, so the contacts are shifted, which is screwing the speaker)????
Looks like will go back to the store :-( if this continues.

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The ringtone speaker is glued to the backplane of the phone.
It's connected via two spring loaded connectors. (Dumb solution imo)
I believe some electrical contact cleaner could solve the problem.
Must be one WITHOUT oil! The oil might enter the lens.
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My suggestion for a fix is this:
Step 1:
Remove plastic backing on the camera. Carefully!
You don't need to remove the entire kevlar backing.
(As you can see the backplate was made very ugly by the ifixit crew)
Step 2:
Hold the phone like the picture, and apply a miniscule amount of contact cleaner here, the idea is to make the cleaning solution hit the two springs and contact pads.
Step 3:
Tap and press the area around the speaker carefully, the idea being to rub the connectors slightly while wet.
Let it dry and keep it lying in this direction, you don't want this stuff in the camera!
All images taken from ifixit.
I take no responsibility for any damage, this would be a last resort type of fix if you can't get a warranty claim for it. This obviously voids your warranty completely too.