PowerShot A710 IS Blurry spot on photos

[quister]

My sister owns a Power Shot A710. The camera takes beautiful photos but many have a blurry spot on the bottom center of the photos. I offered to help her trouble shoot the issue...and what better place to start than this Power Shot forum. I'll attach three examples with this.

[Ray-uk]

It could be some dirt on or in the lens or it could be something on the sensor, apart from cleaning the front of the lens there isn't much you can do with it without dismantling it and unless you are experienced in camera repair then don't bother to try.