Test colours with a wet cotton swab, if your swab ends up with colour, not a good idea to continue. some items are not colourfast and can bleed like crazy. red jumper from pocket pals is one, and sleepy pies purse is another.
When needed I handwash items in zero or woolite, depending on the piece- oxy. rinse well. I am conservative with soap- a little can go a long way.