Boil water in a vessel

Take the boiled hot water in a bowl

Tea tree oil may be added to the water, but it is optional

Put your face, especially the area with a lot of blackheads over the bowl, so that the hot steam hits your face

Keep your face in the same position, so the pores open due to the heat

The blackheads will rise to the surface and fall off or can be easily removed
Wash your face again with cold water, so that the pores shrink again

Ensure that your hands are clean when you touch your face, so that no dirt enters your pores which could cause pimples at a later date.