I bought some "compost remix powder" from Daily Dump and put it into my compost bucket. Now, there is no foul smell, and it's radiating gently with heat. :-) Looks like my compost had been short of brown matter. https://dailydump.org/shopping/index.php/remix-powder.html

Daily Dump has many brick & mortar retail partners here in Bengaluru. So, I could buy the remix powder in person with cash. No need to compromise privacy with online orders! :-)