The water droplets may appear on the garments when you have steam ironed for a while. This happens because steam has condensed on the ironing board.
Dry the wet spots on the garment and the ironing board cover by passing the iron over them without pressing the steam trigger. If the underside of the ironing board is wet, wipe it dry.
Make sure you use a mesh-top ironing board with a thick felt material. This minimises steam condensation on the ironing board. Where possible, select a lower steam setting or use less steam during ironing.
Use steam ironing during the first few strokes of the iron across the garment, then release the steam trigger and finish up with dry-ironing strokes.
Replace the ironing board cover if the sponge material has worn out. You can also put an extra layer of felt between the ironing board and the cover to minimise condensation on the ironing board.