Why isn't my wireless charging not working on one charger?

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AC Question

wireless charging not working on one charger

My wireless charger just stopped working. I have not had any problem until last night. I could not get it to "connect" no matter what position I placed my phone. Tried turning on the daydream feature that I had read needed to be turned on. But, nothing. My phone charged just fine on my other wireless charger in my office earlier in the day. also charged just fine with the cord. This seems like a dumb question...but, is it my wireless charger that has gone bad...it is fairly new....or, is there something that I am missing?