Coughing during MAC

I have had an unusual string of cases recently where I am running a simple MAC case on propofol and about an hour or so into the case, the patient will begin aggressively coughing, likely from secretions accumulating in their oropharynx. Am I just not deep enough? Do you routinely give everyone glyco for MAC? What am I doing wrong?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums