Moisture and water droplets starts to accumulate at the inner wall of the culture tubes/bottles, which is an inconvenience in observation and taking photographs.
Warm up the surface where the drops are forming, they will fall in the medium cleaning the surface. Or leave the flasks and the tubes at room temperature. It is a condensation problem when the liquid inside is hotter than the air outside.
If your growth chamber has several layers (and each layer has its own light source), try not to put your plates, tubes or containers such as Magenta boxes directly above the light source. The heat from it can cause the condensation.
You can autoclave small pieces of filter paper (for example, in a glass Petri dish). Then, dry them in a drying oven without opening the Petri dish so they remain sterile. When the filter paper is ready - sterile and dry, sterilize a forceps and wrap a piece of sterile filter paper around the tip of the forceps, and use that to remove the droplets from the tubes. Avoid touching the plants but even if you do that's no big problem because everything is sterile.
Keep the jars or petridishes slightly open in the sterile running flow chamber. Start and run the flow chamber for sufficient time before you open the jars.
if your problem is only for the time of taking pictures, you can warm up the sides of the dishes/tubes with a hair dryer. A couple of minutes and you will be able to take pictures without droplets.
The problem in opening bottle or with any other treatment to dehydrate the content will also dehydrate the cultures.
Drying with hair dryer, to absorb water with sterile tissue paper, or to open the lid for longer period, or to heat the walls will solve the issue for a while and make the culture prone to heat damage or contamination. A solution of the problem is little bit suggested by Yuan Yeu Yau. Becuase it is not a matter of taking picture only but it may result in bacterial/fungal contamination, problem in proper illumination to growing explant, Shoot tip necrosis etc. I request kindly suggest solution to get rid of condensation itself inside the vessel. As Yuan said it is a problem of heating. Then circulation of cold air of AC from the outer wall cause condensation. I have multi shelves culture rack. I tried to direct the AC's cold air current toward ceiling and also put a transparent polythene sheet (giving slight gap from culture vessel) over the shelf of the rack to avoid cold air current from direct contact of lid. Then also I am getting condensation kindly suggest what more I can do.
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