kaffir lime tree and pest control

Hi everyone
I have a small (about 1ft) kaffir lime tree in a pot indoors. It keeps getting attacked with tiny red mites. I got fed up today and sprayed "westland plant rescue fruit and veg bug killer" on to the leaves. I use the leaves to cook with and would like to know how long I would have to wait until I can use them again - or if I can at all anyway. On the bottle it says leave fruit and veg about 2 weeks before eating - but the difference is I use the leaves which have the spray directly on it.
So when can I use the leaves again or have a basically messed my edible plant up for a year?!


Secondly, I keep getting these red mites on the tree, how can I permanently get rid of the little pests?
Thanks
HP

 

Hello I have the same problem plus my leaves are going white ish, did you sort your problem out?
Alan