whitening agent for white leather clothes

I second the use of Napisan. Brilliant for whitening net curtains too.
Does anyone have any tips for keeping white suede trainers clean?

Soak whites in Napisan. Especially socks and shirts.

And, Bar Keepers Friend on any stains. Works for me. An excellent all round cleaner.

I cleaned my GDs leather trainers with bicarbonate of soda on a damp cloth and it worked a treat.

Lemon juice worked on the arms of a sofa I had, worth a try or a leather cleaner.

I always soak with Vanish (underwear or socks), it helps.

Sorry, slightly off topic but I'd like a whitening agent for undies.

Why did you lay in the closet, sorry couldnt resist