diff --git a/src/mslice/models/workspacemanager/workspace_provider.py b/src/mslice/models/workspacemanager/workspace_provider.py
index 9a55f2a7..f584c493 100644
--- a/src/mslice/models/workspacemanager/workspace_provider.py
+++ b/src/mslice/models/workspacemanager/workspace_provider.py
@@ -46,7 +46,10 @@ def get_workspace_name(workspace):
 
 
 def delete_workspace(workspace):
-    workspace = get_workspace_handle(workspace)
+    try:
+        workspace = get_workspace_handle(workspace)
+    except KeyError:
+        return None
     remove_workspace(workspace)
     del workspace
 
diff --git a/src/mslice/util/mantid/algorithm_wrapper.py b/src/mslice/util/mantid/algorithm_wrapper.py
index 690ee2d5..cedc172a 100644
--- a/src/mslice/util/mantid/algorithm_wrapper.py
+++ b/src/mslice/util/mantid/algorithm_wrapper.py
@@ -98,6 +98,13 @@ def remove_from_ads(workspacename):
     if AnalysisDataService.Instance().doesExist(workspacename):
         AnalysisDataService.Instance().remove(workspacename)
     # Remove hidden workspaces from ADS
-    workspacename = '__MSL' + workspacename
-    if AnalysisDataService.Instance().doesExist(workspacename):
-        AnalysisDataService.Instance().remove(workspacename)
+    hiddenworkspace = '__MSL' + workspacename
+    if AnalysisDataService.Instance().doesExist(hiddenworkspace):
+        AnalysisDataService.Instance().remove(hiddenworkspace)
+    hiddenworkspace = '__MSL__mat' + workspacename
+    if AnalysisDataService.Instance().doesExist(hiddenworkspace):
+        AnalysisDataService.Instance().remove(hiddenworkspace)
+    hiddenworkspace = '__MSL' + workspacename + '_HIDDEN'
+    print(AnalysisDataService.Instance().getObjectNames())
+    if AnalysisDataService.Instance().doesExist(hiddenworkspace):
+        AnalysisDataService.Instance().remove(hiddenworkspace)