Breathable waders should not be washed with any detergent that is scented for leaves a residual material. Most modern detergents contain a UV brighteners so detergents should NOT be used. See instructions later in my post.
Breathable wader have a DWR (Durable Water Repellency) Coating that has to be renewed. I wash and retreat my waders at the end of every season.
Why does a breathable fabric need water repellency? Because when a Gortex garment is coated with water, the water vapor that passes through the Gortex membrane is trapped from escaping to the outside air. So the garment cannot breath. The garment acts just like a solid sheet of plastic and your perspiration is trapped and condenses on the inside of the garment and on your clothing. This is a phenomenon called "wet out". You may think your waders have a small leak but the moisture is sweat condensing inside the waders.
The DWR requires renewal and a heat set. Read what Gortex says is the reason to use a dryer.
Restoring Water Repellency - GORE-TEX® Products
Here is a primer on how to care for breathable garments by REI.
Rainwear: Durable Water Repellent (DWR) Care
I personally do not use Revivex. I use Nikwax TX.Direct
. It has performed well for me. The product you use to wash your waders is important. It should be a powder and not a liquid, and it should be unscented. That is to prevent any detergent residues that would interfere with the DWR application or seal the Gortex pores. I use Ivory Snow unscented powder. Alternatively, you can use a residue free product like Sport-Wash.
To use the Nikwax TX.Direct, wash your wader or rainwear and rinse well. Hang it up outside and allow the water to drip off. While still damp, spray the wader or garment with Nikwax TX.Direct and cover all areas. Then put in your dryer and dry on the "Permanent Press Low Heat Cycle." Put the suspenders of the waders into a sock to protect them while the DWR sets.
Follow the manufacturer's direction if you use another DWR.
I wrote an article for our TU Chapter Newsletter years ago.