diff --git a/slapos/grid/SlapObject.py b/slapos/grid/SlapObject.py
index 6dfb9dd35064408212ef4c75c65c25fa21a1f1fa..39ba232e0419b99aee3b970142b109212d27cc4d 100644
--- a/slapos/grid/SlapObject.py
+++ b/slapos/grid/SlapObject.py
@@ -30,6 +30,7 @@
 
 import os
 import pkg_resources
+import psutil
 import pwd
 import shutil
 import stat
@@ -444,6 +445,10 @@ class Partition(object):
     gid = stat_info.st_gid
     return (uid, gid)
 
+  def getUserName(self):
+    """Returns the name of the owner of partition"""
+    return pwd.getpwuid(self.getUserGroupId()[0]).pw_name
+
   def addServiceToGroup(self, partition_id, runner_list, path, extension=''):
     uid, gid = self.getUserGroupId()
     for runner in runner_list:
@@ -673,11 +678,12 @@ class Partition(object):
     if not self.checkRetentionIsAuthorized():
       return False
 
+    uid, gid = self.getUserGroupId()
+
     # Launches "destroy" binary if exists
     destroy_executable_location = os.path.join(self.instance_path, 'sbin',
         'destroy')
     if os.path.exists(destroy_executable_location):
-      uid, gid = self.getUserGroupId()
       self.logger.debug('Invoking %r' % destroy_executable_location)
       process_handler = SlapPopen([destroy_executable_location],
                                   preexec_fn=lambda: dropPrivileges(uid, gid, logger=self.logger),
@@ -726,6 +732,29 @@ class Partition(object):
     except IOError as exc:
       raise IOError("I/O error while freeing partition (%s): %s" % (self.instance_path, exc))
 
+    # Kill remaining processes
+    try:
+      current_pid = os.getpid()
+      [x.terminate() for x in psutil.process_iter() if uid in x.uids()
+       and x.pid != current_pid]
+    except (psutil.NoSuchProcess, psutil.AccessDenied) as e:
+      self.logger.info("Process finished before being "
+                       "killed when freeing partition %s" % self.instance_path)
+    except psutil.TimeoutExpired as e:
+      self.logger.error("Couldn't kill process %s of destroyed partition %s"
+        % self.instance_path)
+
+    # Clean user crontab and at jobs
+    user_crontab_path = os.path.join('/', 'var', 'spool', 'cron', self.getUserName())
+    if os.path.exists(user_crontab_path):
+      os.unlink(user_crontab_path)
+
+    at_directory = os.path.join('/', 'var', 'spool', 'atjobs')
+    for at_file_name in os.listdir(at_directory):
+      at_file_path = os.path.join(at_directory, at_file_name)
+      if uid == os.stat(at_file_path).st_uid:
+        os.unlink(at_file_path)
+
     return True
 
   def cleanupFolder(self, folder_path):