I would think a warm day (very warm here in Phx) would allow it to return to its normal straight molded state. If you dont have really warm days, perhaps when the kitchen royalty is not around, perhaps 20 mins on a warm temp in the stove and then outside on the driveway to reset?
I did have a cheap HF hose that I picked up an unused (but new), and in the "relative" cold here in Phx, it just didnt offer the right flexibility I needed. I offloaded it during warmer weather for better examples.
Heck, even recirculating hot water would give it the flexibility it needs unless its just the wrong material to start with.