Docking issues

My robot is new. I’m just mapped and cleaned house once. Now it can not find the docking station to charge. It circles in front on it and then roams around. I’ve cleaned all sensors and made sure nothing is tangled underneath. Ideas?

I'll say try to have empty space to either side and to the front of the docking station. See if that works. Also I don't know if you need a strong wifi signal to the docking station, you may want to find another location in your house / apartment.  

The l40 just ran over cat excrement, fyi. Not happy.

Make sure dock is plugged in all the way... is base isn't plugged and powered, it will not recognize.