The more you use your app cache builds and can slow the app's response

Weekly -  always do a router restart then turn stick off and on at wall once your internet has come back on 

Home button on remote - setting - apps = manage installed apps - find your app on the list 

select it

clear cache force stop then launch.

FORTNIGHTLY

AS ABOVE BUT ALSO CLEAR DATA AND CONFIRM

U WILL NEED TO RE-ENTER YOUR LOGIN AFTER CLEARING 

DATA AND LAUNCHING APP

IT IS  IMPORTANT YOU KEEP THESE SAFE AND ENTER THEM CORRECTLY