As you may have heard during tour coverage, riding the incredibly slick wet cobbles can be “like a cow on ice.” Having never been a cow I cannot confirm that this is factual, however, my imagination certainly agreed with the sentiment.
The secret we found was there is no secret. Just do your best. If you’re able to ride and feel safe, go for it. If you need to climb off and 4-point in stocking feet, do it! At least you won’t be smacked down onto one of the hardest surfaces you’ll encounter as a cyclist.