I have ironed my drysuit in the past to restore the DWR, and it worked quite well. Water beaded right up. That said, I haven't done it again. After a dozen uses I start to lose DWR effectiveness on a new garment, and it's probably half that for the ironed suit. So my suits wet out on the surface, and I don't worry about it.
A hot dryer is not recommended for drysuits, because of the gaskets, so I'd stick to an iron for renewing the DWR.
Kayak & Canoe Outriggers
PFD's (Life Jackets)
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