Part warping from the center

[Jbc]

I am printing well with no edge curl but I am getting parts that tend to bow upward from the center when cooled.
The part prints flat and adheres to the bed but starts bowing upwards when cool.

Any solutions?

jbc

[CompoundCarl]

I would use a brim with lots of outlines to hold down the edges of the part.

[Jbc]

All of the edges stay flat. The entire print sticks to the bed no problem.
When the part cools and is removed from the bed the part will arch. The edges stay touching the bed. The center is lifting upwards a little.

[Jbc]

Ignore the fact my finger looks like a creepy troll's finger. Photoshop didn't like the aspect ratio of the iPhone video.
Here you can see what I mean by the center lifting upwards.

BOW.gif (1.69 MiB) Viewed 1634 times

I think something about the center of my parts cooling/shrinking more than the extremities.
I've tried reducing my infill width percentage but only by 10% and didn't notice any difference.
I think I'll try 50% and see.