The proper storage of beginning microscopes will prevent problems usually caused by fungus growth on the optical surfaces. To prevent fungal growth, the microscope should be placed in a dry heated box or cupboard at least 5oC warmer than the environment.
Mild soap solutions, rather than organic solvents, can be used to get rid of oil and dirt on exterior painted surfaces, including the stage, to lessen the chance that paint will be stripped off. Only certain cleaning solutions are suitable for frequent or long term use. Other cleaning solutions may be used on an occasional basis. Xylol (Xylene) should never be used since it will damage the cement used to mount the lenses in place in objectives and eyepieces.
Only certain materials are suitable for cleaning beginning microscopes. If lens paper is not obtainable, high quality tissue paper, including toilet paper, can be used. When cleaning beginning microscopes, it is best to work from the top down. Cleaning the eyepieces should be done first. The tip of a cotton swap is moistened with 70% alcohol or lens cleaning solution and the eyepieces wiped with the swab. Using lens paper, wipe the eyepieces dry. Cleaning and drying is repeated if required.
Objectives, while attached to microscope, are next cleaned. The lens paper is moistened with the cleaning solution. Using a circular motion, the objective is wiped gently from inside out. The above steps are repeated at least twice and then wiped with dry tissue or lens cleaning paper. The above steps are repeated separately for each objective. Keep in mind that objectives should never be removed from the nosepiece. It is important to unplug beginning microscopes from the power source before cleaning its body.
The condenser lens and auxiliary lens are located below the stage and can be reached by lowering the stage by using the stage controls. Beginning microscopes have Abbe condensers and have no auxiliary lens when new.
First find the location of the bulb before removing or cleaning it. In most models of beginning microscopes they are located in the base of the scope and are reachable by turning the scope on its side, being careful to remove any loose lens or mirrors. It is very important to follow the manufacturer’s instructions in removing the bulb. The following points should be highlighted: By the use only tissue paper or an appropriate device specifically to remove bulbs, the bulb is removed and its model number is checked. The correct bulb model and wattage can usually be located on the rim of the bulb. Use the correct bulb to acquire the correct amount of light. Obtain a new bulb then use tissue paper to change the bulb. Never touch the bulb with bare fingers. Use lens paper or gloves. Oil from fingerprints on the bulb may cause the bulb to explode, prematurely burnout, or decrease the light output. Replace the bulb by holding it with lens paper or an appropriate device. Beginning microscopes should never be disassembled, except by a service expert. If you open up the beginning microscope, it can cause the optics to become contaminated by dust and fungus.
