Bike protection spray? Do you spray the entire bike, or just the metal places where fluid could rust the metal? The spray down makes sense. No more hose baths. As for bolts, I usually spray WD40 onto a rag, then rub the bigger bolts down. I lube the chain every other ride, but always notice rust beginning to develop between applications.
I have a Giro Air Attack and the magnets on the visor and the contact points have disintegrated. They just replaced the helmet b/c the contact points (on helmet) broke through the out shell of the helmet. My aero helmet is fine…it doesn’t have exposed metal parts and I don’t use it all that often.
DSW, I drink a ton of water…I prob don’t need the electrolytes, but I only use them during races and longer rides. Maybe I’ll just do away with them totally.
I spray the whole bike as find it stays cleaner that way (bit like waxing the car, rain and dirt run off a bit more easily), but definitely more focus around the drivetrain.
Use grease instead of WD40 on bolts - stickier and offers much more protection for non-moving parts.
If you take your bike out in wet conditions use a wet lube instead of a dry one - picks up more dirt, but should last a lot longer than a couple of rides. I have a wet lube on my commuter bike, gets ridden 6-10 times a week in sometimes atrocious conditions (rain, dirt, salt on roads in winter, etc), the chain gets a clean and re-lube most (not every) weekends, never do anything midweek other than hang it on the rack, and I’ve never had a spot of rust on it. The extra grit in the drivetrain does mean it’s a bit noisier and that the chain/cassette wear out relatively quickly, but that’s an acceptable trade-off for lower maintenance on a bike that I use so often (and it still saves me a load of money compared to other transport options).
If you’re using dry lube and hosing your bike down I’m not surprised you’re getting rust - I only use dry lube on bikes that are only used in nice summer conditions, and would never spray them with water, and still find I need to re-apply the lube every ride or 2.
I don’t know the Giro Air Attack - assume there is no metal in contact with your head, so how exposed are the metal parts to your sweat? Maybe worth wiping them down after a ride to get the sweat off, or seeing if you can find a helmet that doesn’t have metal parts if you can’t fix the problem.