Apply a 'good' drop of the content of the little flask to the stockings of the inner slide.
With the outer slide you brought up and spread the liquid by moving the outer slide several times.
Apply some liquid from the greater bottle to the inner slide. Apply it in a way,
that it trickles approximate 10-20cm from the top to the bottom. Again
spread the liquid by moving the outer slide several times
Now apply a little bit water with a spray bottle and repeat that, if neccessary.