im fairly new to printing and have only been printing about 3 months. over the course of 3 months i bought 3 printers. A1 mini, A1 mini with AMS and a A1 with AMS.
So far all printers have been amazing but i will say this i did not was the plates at first with my minis I just started and went. when I got my A1 recently did the same thing. put together and started running but thats where the issues started.
I like to use a Matte Rainbow PLA and I noticed on the new A1 the first layer print was not sticking and looked terrible. I decided to run the plate under hot water and wash it with dawn dish soap. after that started a print and the print came out amazing.
So I say even if the printer is brand new. Wash your plate because it was not working well right out of the box.