Just spray two squirts on the tissue provided then fold the sprayed area inwards so to cover the wet area and sniff the tissue 5cm from your nose. Breathe in the vapour. Avoid touching your nostrils and eyes as the strong smell may irritate the eyes and or sensitive skin around your nostrils. For best results ensure the person is sitting in an upright position whilst inhaling the menthol oil vapour. Repeat breathing in and out for as long as required, the strength of the menthol vapour will subside after 15 minutes. Re-apply if necessary.