On Tue, 25 Jun 2013 00:14:30 -0500, zxcvbob >
wrote:

>Someone at my house put a nice-looking but inexpensive (Walmart) bamboo
>cutting board in the dishwasher -- on the "potscrubber" cycle with the
>sanitizer water heater selected, and also heat-dry. As you can imagine,
>it warped badly and is almost unusable. I'm trying to straighten it out.
>
>I've wet it on both sides and put it on the countertop with about 60
>pounds of dumbbells on top. That almost takes the warp out, and I'm
>hoping it will sag overnight and flatten completely. No idea how much
>it will spring back when I take the weight off. I took the weights off
>after about an hour to see if it was doing anything and it was
>definitely straighter -- but not anywhere near enough.
>
>Anybody have a better idea? I think I'm on the right track but might
>need to run it thru the dishwasher again and weigh it down while it's
>still hot. Sort of like steaming it.

If you put the board curved side down outdoors in direct sunshine, it
might straighten it out. If you do this though, keep an eye on it as
it may curve too far. I've straightened plenty of planks of wood this
way, not too sure how it'll work on a bamboo board... but it might
work.