Im closing in to my second winter now where my 7 chilli plants that i have is getting aphids in the end of summer, the chillies stay outside in a greenhouse during summer time, but inside during after summer time because its like 5c outside now, i didn't take the chili plants in before it was like 8c so plant have lost a lot of leafes and probably been damaged by aphids during summer too even tho i could not see much aphids on the plants during summer, was thinking maybe other insects ate them but now they are inside and aphids is appearing again in small numbers but even after showering them for the 3th time now after taking inside last week they keep showing up, Some of the chili plants is about 3 years old as well so getting rid of them would be annoying but maybe that is the only solution as its getting time consuming to battle them with water?