According to Hatha Yoga Pradipika and sage Ghrenda, cleansing techniques are important to keep the body free from Toxins. Our sages emphasize the cleansing techniques as they lead the path of purification. It includes-
1.DHAUTI
2. BASTI
3. NETI
4. LAULIKI
5. TRATAKA
6. KAPALBHATI
All the above six techniques remove the toxins from the body, massage the internal organs and keep them healthy. As we know we have no other option to remove the dirt from the internal organ as we commonly do and able for external body parts.
Above technique also activate the chakra and evolve the higher Consciousness.