you cant once they are in there
The first thing to do in order to remove creases from leather handbags is to hang them for over a day. A cold iron can be used in case the results are needed urgently.
To remove creases from a leather handbag, gently fill the bag with soft materials like towels or tissue paper to help reshape it. Use a hairdryer on a low heat setting, holding it a few inches away, to warm the leather slightly while smoothing the creases with your hands. Alternatively, you can use a leather conditioner to help restore its flexibility. Always test any method on a small, inconspicuous area first to avoid damage.
Iron the tie beneath a damp towel, this will remove the creases
the oils are in the leather; a cleaner will remove dirt particles on the leather, but won't touch what is embedded in the leather. Try advleather.blogspot.com
Buy clean leather.
how do you remove scuff marks from a smooth leather purse
The best way to remove motor oil from leather is to use leather cleaner. You can also try to use Oxy-clean.
somehow
how can i get diesel fuel off my leather jacket
vinegar
With your tongue.
To remove diesel from leather shoes try rubbing the leather with dry baking soda. It will be important to remove the moisture first.