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Some of the walls of the house are load-bearing, thicker than others, and have a function that hinders the wireless routing signal.
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Simple, because the kitchen is small and has many columns, which shields the signal.
Hang on the toilet door! Or make your own wall!
Definitely, the kitchen next to it is already a bit of a hygienic problem.
First, check the kitchen to see if there are any leftover rice or grains that have insects, and then the insects will emerge into moths over time.
There are people on Cool Knorr who ask similar questions. You can refer to the above floor plan and how it is designed for this step.
There is no need to unscrew the shell to change the lamp, unless you want to change the set, the shell is hanging there because the wires are knotted there, and the shell will naturally fall off if you untie it.