CHICAGO -- Steven Winkler uses Uber all the time and never had a problem until he recently spotted an issue on his bank statement: an extra $50 charge from the ride-hailing service.

He contacted the company online and was told he was charged a cleaning fee. They also sent him pictures from the driver of what appears to be a wet seat. But Winkler says it wasn't him.

"There is no way I could have done that without knowing about it," Winkler told CBS News.

Get Breaking News Delivered to Your Inbox

Uber says cleaning fees include not only the cost of cleaning up a mess but also lost time for the driver.

Winkler is not alone. Social media is filled with upset Uber customers insisting they were wrongly charged for a mess they didn't make.

Got charged a $150 cleaning fee by @Uber @Uber_Support. Driver sent fake pic it seems and now they won't refund? @JasmineSong_ — kate sullivan (@inKESuwantd2kno) August 21, 2017

@Uber a 90$ cleaning fee? Really! I was in the car for 5 mins and I never damaged the drivers car #deletingapp — Grant Meier (@DJsmokescreen94) August 15, 2017

@Uber @Uber_Support disgusted I was robbed £110 by your driver for cleaning fee! The mess shown in the picture doesn't even look realistic!! — rachel Verralls (@rverralls1) August 7, 2017

The Better Business Bureau tells CBS News they've received more than 130 complaints about Uber cleaning fees.

John McGann and Crystal Drake were charged $150 and were sent a picture taken by the driver, but insist it never happened.

"They definitely need a better system in place than what they have," McGann told CBS News in an interview.

Uber is aware of these disputes and said a statement to CBS News that the company is "... enhancing our internal processes and investing in additional resources when investigating cleaning fee claims. While messes and spilled drinks can happen in moving vehicles, we are actively looking into reports where fraud may be detected and will take the appropriate actions on those accounts."

After complaining to Uber, both Winkler and Drake received a refund.

"My advice for other people would be to take a video when you get our of your Uber," Drake said.

Uber says drivers who submit a fraudulent cleaning fee could lose their ability to drive for the company.