diff --git a/gui.py b/gui.py
index 7a57a23..d693075 100644
--- a/gui.py
+++ b/gui.py
@@ -125,7 +125,7 @@ def set_clean_command(self, command):
         self.clean_command = command
 
     def do_clean(self):
-        self.app.clear()
+        self.app.clear(self.clean_command)
         self.redraw_lines()
 
     def set_pid_lookup(self, string):
@@ -141,10 +141,25 @@ def set_pid_lookup_enabled(self, value):
             return
 
         self.pid_lookup_enabled = value
+        self.app.set_pid_filter_enabled(value)
+
+        if self.pid_lookup_enabled:
+            self.button_pid.config(bg="green")
+        else:
+            self.button_pid.config(bg="grey")
+
 
     def set_pid_mask(self, string):
         self.app.set_pid_mask(re.compile(string))
 
+    def on_button_pid_pressed(self, event):
+        self.set_pid_lookup_enabled(not self.pid_lookup_enabled)
+        self.redraw_lines()
+
+    def on_button_clear_pressed(self, event):
+        self.do_clean()
+        self.redraw_lines()
+
     def __init__(self, app):
         self._filtered_count = 0
         self.app = app
@@ -196,6 +211,14 @@ def __init__(self, app):
                                 textvariable=self.sv_filter, width=45)
         self.textFilter.grid(row=0, column=1, padx=5, pady=10)
 
+        self.button_clear = Button(self.panelFrame, text="Clear Log")
+        self.button_clear.bind("<Button-1>", self.on_button_clear_pressed)
+        self.button_clear.grid(row=0,column=2, padx=20)
+
+        self.button_pid = Button(self.panelFrame, text="PID")
+        self.button_pid.bind("<Button-1>", self.on_button_pid_pressed)
+        self.button_pid.grid(row=0, column=3, padx=20)
+
         self.scrollbar = Scrollbar(self.textFrame)
         self.scrollbar['command'] = self.textbox.yview
         self.scrollbar.pack(side='right', fill='y')
diff --git a/smartlog.pyw b/smartlog.pyw
index b86d40f..0ccf3dc 100644
--- a/smartlog.pyw
+++ b/smartlog.pyw
@@ -38,7 +38,7 @@ parser.add_argument("--start_clean", default=False, action='store_const', const=
                     help="executes clean command on startup.")
 parser.add_argument("--command_clean", default="adb logcat -c", help="specifies clean command.")
 
-parser.add_argument("--pid_lookup", default="", help="specifies string for looking process id.")
+parser.add_argument("--pid_lookup", default="oxygine init", help="specifies string for looking process id.")
 parser.add_argument("--pid_mask", default="\((.*?)\)", help="specifies regex to searching pid in a text line.")
 
 parser.add_argument("--file", default="", help="specifies log file to read.")
@@ -78,6 +78,9 @@ _args = parser.parse_args()
 
 # IF DEBUG
 # _args.command_execute = "netstat -a"
+# _args.command_clean = None
+
+
 
 file_name = default_file_name
 
diff --git a/smcore.py b/smcore.py
index 67f7d9d..4940a28 100644
--- a/smcore.py
+++ b/smcore.py
@@ -245,7 +245,6 @@ def set_pid_lookup_string(self, value):
 
     def set_pid_filter_enabled(self, value):
         self.pid_filter_enabled = value
-        self.pid = None
         if value:
             self.update_pid(self.buffer.get_lines())
 
@@ -293,7 +292,8 @@ def set_new_lines_callback(self, callback):
         self.new_line_callback = callback
 
     def do_filter(self, lines):
-        return [x for x in lines if x.can_show(self.filter, self.pid)]
+        pid = self.pid if self.pid_filter_enabled else None
+        return [x for x in lines if x.can_show(self.filter, pid)]
 
     def get_filtered_buffer(self):
         if self.filter or self.pid: