On 3/6/2016 9:16 PM, T wrote:
Hi All,

I have a slow kitchen drain.

I has used several of the liquid plumber and friends things
down the drain. Upon flushing after the wait period, the
drain runs beautifully.

But 20 minutes later, it is back the way it was.

further down the drain pipe, the washer exhausts into the
same drain pipe. The washer has no problem at all. So I
presume, the clog is somewhere between the kitchen sink
and where the washer enters.

I have poked around the sink pipe with one of those
hair grabbers and nothing but a slight amount of scum
comes back.

Any words of wisdom? Is there a better chemical to try?
Is it time to call a plumber?

Many thanks,
-T

Have you tried hydrogen peroxide?