After you’ve
blotted up as much as possible, pour club soda over the
spill. Be generous and really pour it on. The carbonation
will work to bubble the spill away from the fibers, so you
can blot again. Use clean, light-colored towels over the
area and stand on them again.
Continue this
process (club soda/blotting) until the stain is completely
blotted, and the towels are only wet with club soda, and
no trace of the spilled liquid. You can follow up with an
effective carpet stain remover. Be sure to use the product
as directed and don’t rub.