Prepare the toilet by making sure the toilet seat is completely dry. If not dry then the stickers on the bag might not adhere.
Go for a pee before doing the test. HyStool bags are water soluble and will start to dissolve on contact with water. Going for a pee
before doing the test reduces the chances of urine being released into the bag.
Put some toilet paper into the bottom of the bag before doing a test. Toilet paper helps prevent a potentially moist stool from directly touching the bag.