I had a similar experience with a Remington shaver and was going through corroded cutters and turn foils every three or four weeks before throwing it in the trash.
I assume you have air conditioning which both cools and dehumidifies the air.
There’s a reason that the snowbirds go to Florida in the winter. Hot air can hold more water vapor than cooler air. We generally think of humidity in terms of relative humidity which represents the percentage of water vapor being held in suspension in the air. However, the volume is quite different at different temperatures. At 95F degrees the air can hold 35 grams of water per kgram of air. At 77 degrees it’s only 20 grams. At 32F it can only hold 3.8 grams of water vapor. In both cases the relative humidity would be 100% saturated. Any reduction in the temperature will cause the water vapor to condense out and turn into liquid. At 95F degrees you sweat a lot to cool your skin and the moisture condenses out of the air making you feel cooler but sticky. Your AC system cools the air and reduces the humidity by the water vapor condensing on your AC evaporator and then the water is drained out into usually a bathroom bathtub drain.
Actually, the foil didn’t corrode. The cutters corroded as a result of rinsing them clean with water. I think that the corrosion dulled them which ten required me applying more pressure to the shaver which then wore a hole or cracked the screen. I agree that Remington shaver foils are very thin.
When I used the Remington shaver there were no cleaning stations available. If memory serves me correctly, the Remington instructions didn’t mention allowing the parts to dry before putting the head back on the shaver as do the instructions for my Braun 7893s shaver. If I thought rinsing the shaver was a good idea, I would use isopropyl alcohol which is inexpensive and dries very quickly while killing any germs which might inhabit the shaver. Is isopropyl alcohol the key ingredient in the cleaning station fluid? I have been using Braun/Eltron/Ronson (Braun shavers sold under those brand names in US) screen type shavers since the early 1970s and never lubricated them nor rinsed them with any liquid or applied any type of oil. In all those years I never had an issue with corrosion, pathogens odor, skin rashes or skin infections. I just brushed out the cuttings daily.
My only thought is that this is the very lowest level of their line of shavers and you sometimes get what you pay for. I do know that the series 7 and higher are manufactured in Germany and the lower level shavers and probably the cassettes are made in various Asian countries.
It may be possible that there’s a series of defective cassettes regardless of their country of origin. Does Braun offer their thirty day money back guarantee? If so, why not just return the shaver.
Talc in the small amount you use shouldn't dull the blades. It's a real fine powder too. I myself have never had any problems with any of my shavers after using talc preshave sticks, or powder.
Like you I used preshave powder to dry my face in the past and never noticed that the shaver cutter places dulled faster.
I looked at the Amazon comments and only the first two were very critical of the cutters and one further down was one comment that was critical of the cutters. All the other comments were very complementary with four stars. That’s what made me think that something had changed in the manufacturing of the cutter. If this is a new shaver I would return it to Braun for a refund.
The Series-3 shavers in my opinion are made for men with a light beard. I can only get a socially acceptable shave with my Cool-Tec and I have a medium to heavy beard. It does ok when used daily, but if you miss a day it will tug and pull whiskers. It has to do with how the hairs get to the cutters through the foil, and the motor run's slower so the cutters don't cut efficiently.
