Im in Australia, what can people recommend:

My house is about 3 years on from a complete renovation.

1. The tiles on the front porch are a pink-beige stony type color and seem
dirty - like with dust etc - I cant sweep or wash it off.

2. The window frames (painted at the same time) are also looking quite
dirty. They are white, but have dirt and dust on them which also doesnt come
off with soap and water.

Does anyone have any good recommendations for cleaning both of the above?

Many thanks.