The B17 has a sweet spot. You prob haven't quite found it yet.

Even so, there is still a break in period.

Here is what I do. Take a tin of Proofide and a hair dryer and
warm the saddle (gently) while melting the Proofide.

Take a scrap of cloth or paper towel and rub Proofide over
the saddle. Use the hair dryer to keep it liquid, which will help it soak in.

You don't need a lot, and too much can ruin the saddle. You want to get
the two spots where your hip bones hit the saddle.

I also treat the bottom edges of the saddle, and about a half inch to an inch of the underside at the bottom.
But it doesn't seem to slow down getting wet much.