@michellesamson Hmmm that’s a tough one. I sometimes get eyelash extensions too but to be honest I’m not so much careful about what products I use but do just try to avoid it touching my lashes at the root where they’re attached. Do you think your concealer and eyeliner are affecting the staying power of the lashes?
For eyeliner you could perhaps try wetting a thin brush and mixing with powdered eyeshadow as an eyeliner? That would definitely be oil free.