Question
I have several plants for years  i treat for scales they are little brown hard shell lumps on certain plants like spider plant my beautiful lime tree and jade plants no matter what i spray on them it always comes back with . it seems to suck sap because the rug under them can get sticky in spots . i wash them with soap and have tried alcahol spray and sprays. they are outside now but will have to come in soon because i live in ohio cold weather soon . i dont want to fight this again this winter. PLEASE HELP THANKS LINDA

Answer
Hi Linda
I just bought a plant that was loaded with scale-so badly I had to throw it away.  I know how aggravating this can be.
Try mixing a bit of Murphy's Oil Soap with the alcohol and spraying with that.  That usually works.  Also, you can purchase at your local nursery a systemic that goes into the soil and works from the roots up.  

Good Luck and let me know if you need any further help.

Leslie