Talking of the selling of bleach at 10 dollars for 2oz: The special 'techwash' nikwax sell for washing proofed waterproofs is err... soap. Pure soap (available as 'soap flakes' in the UK) does the same job.
And tests found that waterproofs can be reproofed with ordinary garment conditioner which works as well as the best waterproofer and better than most.
Both sources are from Leeds University tests carried out for 'Trail' magazine.
simon