"Assalamu alaikum Warahmatullahi Wabarakatuh

Fiqhi Rulings do not apply to things which 'may have' occurred. They only apply to definite occurrences.

Even if pork had come into contact with with utensils or devices like food processors, once they are purified with water (washing thoroughly and making sure all impurities are visibly removed), it is pure to use hence would be permissible to buy and use."

I wanted to ask after having seen this answer-:

I have just moved into a rented house, where things have been used by previous people e.g grill, oven etc. The grill has grease on it (as grills do) am i obliged to wash it before use, as the grill could be contaminated with haraam food effects?

so the question is do i have to purify it first? can you tell me how to do this, i thing it will take a long time for me to remove the grease.