My suggestion, as it's always worked for me, is a liberal application of baby/talcum powder to your tube, which may require removing the tube.
Step # 2 is to remove the core from the valve stem when you inflate. Apply dish soap or tire lube to the beads. You may have to "over-inflate" to seat the beads. If you have to exceed 40 psi to seat the beads you may need to dismount the tire and stretch the beads, either by applying sufficient downward force to the tread and rotating the tire occasionally, or/and pulling the tire's beads apart by hand and working around the tire.
A lot of tires, particularly tube-type tires, come practically flattened and this can make them very difficult to get seated.