dark stain on cream leather

[noddyholder]

I have a cream leather habitat office chair and the leather seat has gone black as I sat on it yesterday in a pair of dark jeans.I tried flash wipes and it didn't budge help!

I find most things just wear off over time. Atm i have large picture of dd1 on my cream leather sofa curteosy of dd2, the 'jungle of fat people' on the othr side of the sofa has now faded.

I clean my sofa about twice a week with part bleach part flash. biro tends to take about a fortnight to start fading.

really bleach?I don't know if I dare!