Hi, can any one recommend a treatment to rid the glass house of white fly ? I had an overwhelming infestation last year and fumigated the glass house twice after emptying it of tomatoes and plants. Washed down with Jeyes fluid after. This year they are back again although there have been sticky traps up since the start of the season. Have sprayed the ornamental plants several times but nothing seems to be knocking these guys down. Any help would be appreciated.