I'm slightly baffled by this. I'm sure it's a good idea to dry your bike/chain, and wash it, but why 'degrease' after it gets wet?
"4. Chain degreaser: After a ride in the rain you should immediately shower and dry yourself. The same goes for your chain. Cover it in degreaser (WD40 or GT85 are both widely available although there are bike specific degreasers like Muc Off) then vigorously wipe it down with a rag until it’s dry. A few drops of lube will then protect it for the next ride. Do this and it can double the chain’s lifespan. It’s a good idea to spray the other metallic moving parts too; front and rear gear mechanisms and brake callipers. Try to keep the degreaser away from the hubs, bottom bracket, wheel rims and brake blocks. Ideally your whole bike would get washed down after a wet ride, but we know that’s not very realistic
Read more at http://www.cyclingweekly.co.uk/news/latest-news/cycling-in-the-rain-how-to-survive-it-19050#1dQTMavY0tzWjVC8.99"