How to clean white stitching on seats??

[SIXTY3]

I have leather seats which are Sahara beige (very light cream) with white stitching and am finding when I clean the seats the stitching becomes discolored. I am using Zaino leather cleaner with a soft clean brush or microfiber, followed by Zaino leather in a bottle.
Is there anything I could use that will clean the stitching without damaging the leather?

[BobbyG]

You could try a toothbrush and some diluted all purpose cleaner and test a spot..

Scrub
Rinse
Towel dry

[SIXTY3]

Thanks Bobby I'll give it a try

[CEE DOG]

Got any Ultima Interior Shampoo gel?

[SIXTY3]

I used a toothbrush and some Autoglym interior shampoo as suggested by Bobby and they have come up like new.
Thanks for the advice

[RhetoricMixes]

I use this on all interior leathers i work on. Perfect for stitching and wont harm the seats one bit. Vinyl & Leather Scrub Brush. FWIW i also use Wolfgang leather cleaner and it gets everything off ive sprayed it on so far.

[Agfan]

I agree with bobby. But make sure it is extremely diluted. Stitching is extremely sensitive and should not get too wet or have a strong chemical on it.