diff --git a/bot_z/bot_z.py b/bot_z/bot_z.py
index facf719..f4b46dd 100644
--- a/bot_z/bot_z.py
+++ b/bot_z/bot_z.py
@@ -10,6 +10,7 @@ import logging
 import os
 import time
 import typing as T
+from urllib.parse import urlparse
 
 os.environ['PATH'] = os.environ['PATH'] + \
     ':' + os.path.join(os.path.abspath(os.path.curdir), 'bin')
@@ -32,6 +33,8 @@ def safely(f: T.Callable) -> T.Callable:
             f(self, *args, **kwargs)
         except WebDriverException as e:
             self.logger.error("Something went wrong: %s", e)
+        finally:
+            self.switch_to.default_content()
 
     return _protection
 
@@ -91,6 +94,7 @@ class Operator(wd.Firefox):
 
         self.debug = debug
         self.base_uri = base_uri
+        self.uri = urlparse(base_uri)
         self.timeout = timedelta(seconds=timeout)
 
         if proxy:
@@ -101,6 +105,7 @@ class Operator(wd.Firefox):
             self.profile.set_preference('network.proxy.ssl_port', proxy[1])
 
         super().__init__(firefox_profile=self.profile, options=self.opts, *args, **kwargs)
+        self.fullscreen_window()
 
         self.z_name = name if name is not None else __name__
         self.logger = logging.getLogger("{}.{}".format(__name__, self.name))
@@ -183,26 +188,34 @@ class Operator(wd.Firefox):
         else:
             self.logger.warning("Logout failed: %s", user)
 
-    def logged_in(self):
+    @property
+    def logged_in(self) -> bool:
         """
         Check if already logged in. Checks if page is '/jsp/home.jsp'
         and if login cookie is set (and not expired).
         """
-        pass
+        _base_domain = '.'.join(self.uri.netloc.split('.')[-2:])
+        cookies = [c['name'] for c in self.get_cookies() if _base_domain in c['domain']]
+        _right_url = "/jsp/home.jsp" in self.current_url
+        _cookies = "dtLatC" in cookies
+        return _right_url and _cookies
 
     @safely
     def check_in(self, force: bool=False) -> None:
         """
         Click the check in button.
         """
-        # TODO: Check if the page displays you're already
-        # checked in.
+        if not force and not self.logged_in:
+            self.logger.warning("Not logged in!")
+            return
         if self._checked_in:
-            self.logger.warn("Already logged in!")
+            self.logger.warn("Already checked in!")
             if not force:
                 return
+        iframe = self.find_element_by_xpath('//iframe[contains(@id, "gsmd_container.jsp")]')
+        self.switch_to.frame(iframe)
         enter_butt = self.find_element_by_xpath('//input[@value="Entrata"]')
-        enter_butt.submit()
+        enter_butt.click()
         # Click the check in button and change
         # self._checked_in state in case of success
         pass
@@ -212,14 +225,17 @@ class Operator(wd.Firefox):
         """
         Click the check out button.
         """
-        # TODO: Check if the page displays you're already
-        # checked out.
+        if not force and not self.logged_in:
+            self.logger.warning("Not logged in!")
+            return
         if not self._checked_in:
-            self.logger.warn("Not yet logged in!")
+            self.logger.warn("Not yet checked in!")
             if not force:
                 return
+        iframe = self.find_element_by_xpath('//iframe[contains(@id, "gsmd_container.jsp")]')
+        self.switch_to.frame(iframe)
         exit_butt = self.find_element_by_xpath('//input[@value="Uscita"]')
-        exit_butt.submit()
+        exit_butt.click()
         # Click the check in button and change
         # self._checked_in state in case of success
         pass