On Jul 9, 10:38*am, "Ray" wrote:
A friend tells me that there is a cleaning solution available which stands
overnight in sink drains to clear away grease build-up.

He also said that he had learned through some "tip sheet" that carbonated
soft drinks accomplish the same thing and are cheaper when you get them on
sale.

Is this correct?

My experience has always been that none of the drain
cleaners, whether liquid or dry type, have been effective
at clearing blocked drains. At most, they made it a
little better and it was soon back to where it was again.
Only a snake has worked for me.

As for soft drinks working, forget about it. Most of the
drain cleaners are based on alkalines, not acids. But
whether acid or base, the cleaners are orders of
magnitude more powerful than a soft drink like soda.