Yes, I realize that many hoyas can be messy when they are in bloom but this is such an important part of what nature does to continue and survive. The worst culprit of oozing sap I have found is this Hoya pallilimba. She puts out many many little parasol looking bloom clusters and they stay open for over a week. As the days go on the more sap is produced and you have this gorgeous bit of nature. Fortunately for me, this is happening outside and unfortunately for the bees, it is a maze to get thru the screened enclosure to get to all of this yummy juice. This is a full on beautiful hanging plant that rewards me with endless flowers with a butterscotch fragrance all summer!