The directions are short: shake well, spray 4 pumps (about 0.60 mL) into your mouth or onto your tongue once daily, preferably in the morning.
Shake, spray, done. Tying it to something you already do each morning, like brushing your teeth, is the simplest way to stay consistent.
Preferably is a soft word, so the morning is a preference rather than a rule. Always follow the label on the bottle you receive, and do not take extra pumps in the hope of speeding things up.