You can prepare them either way. Don't run cold water over them though because they're delicate and can be crushed. The best way I found is to put them in a colander and then lower it into a large bowl of cool water. If you prefer, you can use a mixture of 8 parts water and 1 part vinegar to help prevent molding. Don't let them sit in there for more than 15 seconds or so. You don't want them to take on the white vinegar taste. It's important to dry them well before storing them. Because a salad spinner would crush and bruise these delicate, delicious fruits, it's best to dry them on paper towels or a clean kitchen towel. You can then proceed with storing or using them.