My concerns too lay with the thick sticky-looking film that seems to be everywhere.
Our balcony garden acted very strangely this year. It grew very quickly as if time lapse photography was happening before our eyes! The leaves were huge as if the plants had been genetically altered, and showed no signs of flowering. Then the large leaves died off and normal sized leaves replaced them accompanied this time with flowers. Yet these leaves had white powder on them which would not wash off.