Where to put diaper cream on baby

Hi mummies, FTM here with a week old baby boy. Where do you exactly put diaper cream on your baby? Is it the whole butt cheeks including butthole ? Do you also put it in between their legs? And diaper creams are all super thick is it normal to put it in patches on baby’s butt like its not even, like its white all over. Do i apply after every diaper change ? And do i remove the previous balance of diaper cream before applying again or just apply over it And why is it hard to wash off the remaining of the diaper cream when giving baby a bath, do i need to use a cloth to rub it ? Im using sudocreme and pureen alternate