Read these passages. see if thry can help you out
I think the most safest way is to use a sponge or a cloth
In 1789 George Washington was sworn in as the first president, and gave the first inaugural speech at Federal Hall in New York City
“What led to the outbreak of the bloodiest conflict in the history of North America? A common explanation is that the Civil War was fought over the moral issue of slavery. In fact, it was the economics of slavery and political control of that system that was central to the conflict.” I hope this helps you for what your looking for