How frequently should I clean my stretcher and what could I use?

After every use. A stretcher for an ambulance? After every use and at the start of your shift, since you don't know if it was done before. Hopefully, you were given guidance on this. If not, someone is not doing a good job training and ask them for the protocol in place for infection control for your job. If this is not about stretchers used for sick or immobile people., ask again and clarify.