Sometimes, steam can condense on the ironing board and this can produce water droplets.
When this happens, you can easily dry the wet spots on your garment and the ironing board cover by ironing it without steaming.
To prevent this you can:
1) Select a lower steam setting or only use steam during the first ironing strokes and then finish up with dry-ironing strokes.
2) You can also put an extra layer of felt between the ironing board and the ironing board cover to minimise condensation on the ironing board.
3) Replace the ironing board cover if the sponge material has worn out.