India, Nov. 29 -- Prolonged and unplanned lockdown came up with many challenges to commoners; above all there is an inflated power bill that has given them nightmare. Month-to-month doubling of a residential electric bill is not an unusual incidence in India. It's usually climate related, either lots of extra air conditioning during a summer heat wave, or lots of extra indoor space heating during the passage of a winter arctic air mass. Sometimes long stays at home also causes a lot of power bills because of our dependency on microwaves to geysers and all possible electric appliances for routine life. Scale on the water heater's heating element could increase the amount of power needed to achieve a given temperature, but that would be a m...