I read one technique was to put a DAMP cloth on the saddle for about 10 min to then go for a ride of 30 min, then come home and let it dry completely.
When the leather is damp you can mould it (that is how they get the shape in the first place),
when you ride it when it is damp, it will mould where you want it.
Then when it dries it dries to your shape.
If you soften the leather with additives it may stretch when weight/tension is applied.
You actually want it to be firm, just shaped to caress your rear end.
the post about this technique is here. Scroll down to "Breaking in a Brooks saddle".
I read one technique was to put a DAMP cloth on the saddle for about 10 min to then go for a ride of 30 min, then come home and let it dry completely.
When the leather is damp you can mould it (that is how they get the shape in the first place),
when you ride it when it is damp, it will mould where you want it.
Then when it dries it dries to your shape.
If you soften the leather with additives it may stretch when weight/tension is applied.
You actually want it to be firm, just shaped to caress your rear end.
the post about this technique is here. Scroll down to "Breaking in a Brooks saddle".