A clean cloth (100% cotton flannel) and warm water. For real dirt buildup, a little naptha or liquid guitar polish. Swirl mark remover. (similar to polish but without the wax). Saliva is also pretty good. Some people like lemon oil but not all.
Stay away from silicone and abrasives.

Most times, if it's just dust and normal wear and tear around the house, all you'll need is a clean dry rag.