DEAR MISS MANNERS: My husband and I have a vacation house, and we enjoy inviting friends and family to stay there throughout the summer and early fall. Our guests, unfailingly polite, often want to “help” after I prepare a meal, which we do often because I love to cook and the farmers markets are such a delight of abundance. Here’s the rub: Most of our guests do things in the kitchen differently from how I do them. For instance, they put sharp knives, silver flatware, wooden bowls, nonstick cookware and fine china in the dishwasher. These things get ruined in the dishwasher. Now, I’ve never be…
