How to season a carbon-steel pan, per the maker
The routine (de Buyer)
The product page says: hand-wash with hot soapy water to remove the beeswax and dry thoroughly. Gradually heat to medium-high and apply a thin layer of a high smoke-point oil on all sides. Heat about 10 minutes or until smoky. Cool, drain the oil and reheat — repeat as the page describes.
Care
Hand wash only and avoid harsh soap that can strip the seasoning.
From the de Buyer MINERAL B product page.