Oxalic acid can be used to clean the scale inside the solar vacuum tube
For example Kajieer, or have Dan jie. Both liquid and solid. Professional cleaning agent is efficient and does not damage equipment.
Can not, do not do so, the market contains oxalic acid CL ions, solar energy inside the stainless steel parts
Oxalic acid corrosion inside the stainless steel parts to accelerate the aging of solar energy. Solar cleaning with special solar cleaning agent
