Plastic. If you can disassemble, the ideal is to bring them to the bathroom and wash them deep with warm water and soap.
Wood. Wood. To wash them you can use a mix of two equal parts of water and vinegar. Avoid chemicals, which can be very aggressive.
Aluminium. They can be as clean as plastic ones, taking great care not to make them rust.
PVC. Also in this case it is suggested to wash them with soap and water, preferably liquid and Marseille.
