Iphone 4 volume control problems?

A few days ago the + volume button stopped working. If I press it, nothing happens. The minus button works fine though.
Also, if my phone is on silent, I still hear a sound from messaging programs.So, I have to go into settings and turn the sound off manually.
I read that I might have to open up the phone or just clean the earphone socket. Hopefully I just have to clean it. I'm not in any position to open up the phone.
Any suggestions?

Cleaning the innards of the phone might fix the problem. Based on what you have related here, I would say that there's a fair probability that the volume buttons may be worn out (perhaps from being pressed down for too long while in a bag, pocket, purse, etc.). If you are relatively handy with tools, it is not a hard fix. If you do not feel comfortable doing such work yourself, many cell phone repair shops will do the repairs for you for a relatively cheap amount. (At least compared to replacing the phone).

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