MurrayM - Do you have a cover for your BBQ? If not, I'd highly recommend it. It's helped keep my BBQ's in good condition, without having to put them inside out of the weather.
Yes my current BBQ has a cover. I'd never cook steaks without a cover, the difference is day and night.
I meant a BBQ cover - like this: https://www.bunnings.co.nz/matador-4-burner-bbq-cover_p03171318 - you'll find that those help to keep the BBQ in good condition.
Oh, right (d'oh!) Yes I have a cover that covers the whole BBQ when it's not in use. The cover has held up a lot better than the BBQ!