White spot on mint leaves
My mint has finally decided to bush out after much worry but the leaves have white spots on them. I've had a quick inspection and can't see any infestation plus the basil and parsley pots look alright (i.e. no spots on them) and they are next to each other.
Here's an example I found of what it looks like:
I've checked around and can't see any insects plus the neighbouring pots of basil and parsley are not showing similar signs.
Does anyone have any advice?
I have also bought this bug spray from B&Q http://www.diy.com/nav/garden/garden-care-watering/pest-weed-control/insect_control/-specificproducttype-insect___bug_control/Bug-Clear-Ultra-Gun-750Ml-33-Free-11907627 but abit hesitatnt on using it incase I poison myself. I heard soap and water works just as well. Does anyone have any advice?