Anyone had a mattress steam cleaned?

[whataboutbob]

My poor old Dad has lost the ability to walk due to Alzheimers. We had to put him to bed on the sofa bed, his carers did not fit a mattress protector and the inevitable happened. He is now in hospital and the mattress needs cleaning, I gather some companies can do this. Anyone used this kind of service, and roughly how much does it cost? Thank you.