A dentist prepares to receive a patient. The dental unit has no modern equipment for handpiece disinfection. The design of the handpiece does not allow for its autoclaving. Specify the algorithm for the handpiece disinfection in this case.

Answer options

1. Two treatments with 6 % hydrogen peroxide with an interval of 15 minutes between them
2. Two treatments with 6 % hydrogen peroxide and 70 % alcohol with an interval of 15 minutes between them
3. Two treatments with 70 % alcohol or Bacillol AF with an interval of 15 minutes between them
4. Two treatments with 70 % alcohol or Bacillol AF with an interval of 5 minutes between them
5. One treatment with 70 % alcohol or Bacillol AF