Remove top tool bar

Hi All

I need to remove the top toolbar for logged in users and if need be admin if that’s the only way to fix this. I have tried plugin’s and different bits of code as below but still the toolbar appears.

tried this in functions.php of my template

add_filter(‘show_admin_bar’, ‘__return_false’);

Also tried this 1

if (!current_user_can(‘manage_options’)) {
add_filter(‘show_admin_bar’,’__return_false’);
}

Nothing seems to work. Can anyone help here please

Thanks

Glenn