Amritsar: The sale of masks and sanitisers is once again in full swing following the surge in positive cases during the second wave of the Covid-19. Surinder Duggal, a wholesale chemist, said the demand of face coverings and sanitisers increased manifold in comparison to last month. Their demand had been slackening for the past some months. It gained momentum after the resurgence in positive cases in the middle of the last month when more positive cases were daily being detected in the district, he observed. Prof Mohan Singh said: “It is important to have cotton masks. It must remain dipped in detergent for a few minutes. It must be dried in the sun. One must avoid mixing of masks at home. While removing it for the night, its infected surface (outer one) should be turned inside out.” Gunbir Singh, a vigilant citizen, said, the importance of frequent hand-washing and the need to keep a pocket bottle of sanitiser should not be ignored at any cost. Naresh Goel, a sanitiser manufacturer, said, two kinds of liquid hand sanitisers — ethanol and isopropyl alcohol (IPA) — were available. He suggested that citizens must prefer IPA-made sanitiser as it was suitable on almost all kinds of skins. “There are nearly a dozen licenced sanitiser-preparing units in the city. However, unapproved units cannot be ruled out.” He said one should not compromise with the quality of sanitiser at any cost. TNS