I have tiny tiny brown beetles in my home mostly the bathrooms. They are very hard to squish and move extremely fast. No antennas at all. They seem to be very fond of the bathtub especially where there is no grout between the showr wall and tub which is where I think they are coming from and water droplets. They are not springtails I looked them up no resemblance at all. They look just like a very mini version of an ordinary beetle.
Tags: bathroom, beetles, Brown, Hard, squish, tiny, tubs