After every use is probably the best time. Also, before is helpful as well.
you clean it with lens paper.
Microfiber Cleaning Cloth for Microscope Lenses
remove the slide,return the low-power objective, use lens paper to clean the stage of microscope and the lenses
1. Always carry the microscope in an upright position with two hands. One hand should support the base and the other should be on the on the arm. Use lens paper and lens cleaning solution to clean the lenses on the microscope. Paper towel will scratch the lenses. Use a soft cloth to clean other parts of the microscope. Lens cleaning fluid and paper is a must. Do not substitute paper towel, which is far too coarse and will scratch the lenses. Always set your microscope on a clean, flat surface. 5. Always remove slides from the stage and rotate the nosepiece to the lowest power before returning the microscope to its storage area.
Microscope objective lenses are the lenses that you can select on the microscope to change to field of view and magnification.
The first step to clean a microscope lens is to take some lens cleaning paper that you can find in specialty shops or distributors of laboratory equipment. Alternatively, use certified cotton. Never touch the microscope lens with your fingertips since fingerprints can affect the microscope's visibility.
A compound microscope has multiple lenses
microscope has two lenses to increase its magnification
Because lens paper will not scratch the lens. And it the proper way to clean the the lens... Email: sethalfredpacaro@yahoo.com Add me on facebook and i will answer your questions..
Always carry the microscope by putting one hand under the shoe-shaped base and grasping the curved stand that supports the tube and its lenses with the other hand. Everything should be in working order, clean and oil free of dust. If you have a slide with a prepared sample, place it on the stage of the microscope. To maintain the good condition of your microscope, first and foremost guard it from dust. Cover the microscope with a plastic hood when you are not using the instrument and always store it in its case. Clean the microscope carefully to avoid the scratch in the lenses. If some of the lenses have fingerprints, clean them either with lens paper or with some alcohol and a cotton swab. Rinse dirty slides and cover glasses in liquid detergent and warm water.
An optical microscope uses light and one or more lenses to view cells. An optical microscope with two or more lenses is called a compound optical microscope.
The objective lenses on a microscope collects light and brings the specimens into focus.