WC-20SD 20 bottle SPT here!

On to cleaning the interior of the cooler...
As described by Chris, used dry tray of baking soda inside first. Not much difference after a couple of days. Then, wiped down interior several times with solution of about two spoonfuls of baking soda & a pint of water. No smell at all after an hour of drying. Important note; be sure to go over with clean wet cloth to remove residue left by solution.
Replaced dry baking soda dish...no plastic odor at all after a day. Looks like that issue is resolved.
Spanish cedar trays ordered. Will be cutting extra trays and mounting to whole tray for full shelf fit. Plan to get narrow 4" wide strips to mount to trays for full drawers. Very easy to do with wire shelves to use for width & depth fit. Pix to follow when trays arrive.
RR