If you’ve a soft body brush (like or when your shower) or something like that, brush up the shoes and seams, remove the laces if there are any, unbuckle any hardware. With a rag, clean the soles with soap and water and damp wipe the rest of the surface. The olive oil might permanently deepen the color of the leather, I’d hold off on that. In the past, I’ve used mild body lotion for a quick rub down and buff out in place of balm or wax.