Learn from a particle physicist

Feb 19, 2015 learning vacuum phys-332

Handling all interior surfaces (including items being tested, placed, or used inside) with powder/oil-free gloved hands.

Inner surface of a vacuum chamber should be cleaned with lint free cloth and either Isopropyl Alcohol (IPA) or Methyl Ethyl Ketone (MEK).

See more at http://www.abbess.com/vacuum/Maintenance-UHV%20HV%20Chambers