diff --git a/pymzml/spec.py b/pymzml/spec.py
index 0c417fac..9b08284f 100755
--- a/pymzml/spec.py
+++ b/pymzml/spec.py
@@ -1504,16 +1504,13 @@ def readAccession(self, parElement):
                 for precursorElement in element.getiterator():
 
                     if precursorElement.tag.endswith('userParam'):
-                        print ("found user param inside precursor!")
                         itemdict = dict(precursorElement.items())
-                        print(itemdict)
                         if 'userParams' not in self['precursors'][-1].keys():
                             self['precursors'][-1]["userParams"] = {}
                         self['precursors'][-1]["userParams"][ itemdict["name"] ] = itemdict["value"]
 
                     elif precursorElement.tag.endswith('isolationWindow'):
 
-                        print ("get isolation window!")
                         for subElement in precursorElement.getiterator():
                             if subElement.tag.endswith('cvParam'):
                                 accession = subElement.get('accession')