What fabrics should I hand wash?
"All items you personally define as delicate items (clothes that are dear to you) will last longer if hand washed. However, the most general way to define if clothes should be hand washed will be found on the care label. Normally high fashion items, delicate silk, wool, cashmere, and merino wool (especially fine knits) meet the qualification for hand washing."
Can I hand wash 'dry clean only' clothes?
"Many garments that have a 'dry clean only' symbol can actually be hand washed. Usually, this is about either the fashion brand, the fabric mill, or the suppliers to the fabric mill, being extra careful. The sign is there to ensure they take no responsibility if you harm the garment in a wash. But, in many cases, it’s perfectly fine to hand wash. Be very careful if you decide to hand wash 'dry clean only' items, as some of these fabrics might be harmed by water. To avoid this, before hand washing any 'dry clean only' items, look up how the item's textiles and trimmings will react to water, if you cannot find anything extra sensitive, it should be ok to hand wash gently."