Professor Hugh Pennington said filmed footage by the BBC led him to believe lives were being put at risk on the wards, the BBC reported.
The film shows overflowing bins and bloodstained gowns left on a theater trolley at the Kent and Sussex Hospital in Tunbridge Wells.
A hospital spokeswoman said its cleaning service was being improved.
Pennington said the footage revealed "inexcusable" practices.
He said the hospital, which is used by people living in north Sussex and west Kent, was not even clean by domestic standards.