From your answers it is clear that you know your history pretty well. Even though your score isn't perfect, you show enough enthusiasm for the subject matter to be considered an amateur historian, and with further study you could quite easily become an expert!
Zap a wet one in the microwave for 2 minutes every day and replace it every 2 weeks. Better yet, use cloths, towels, and rags that you can toss in the washer or clean with bleach.