In message . com, las
writes
My hibiscus has a drop of something at the base of many of its leaves.
It is shiny, semi-clear (like cloudy water), firm, but can be easily
crushed, and quite sticky. Does anyone know what this is?

TIA
LAS

Some types of Hibiscus have foliar nectaries. IIRC, none of the commonly
grown types do, so perhaps they aren't in your case.
--
Stewart Robert Hinsley