20mls citronella oil
20mls tea tree oil
500mls malt vinegar
500mls strong cold tea
place everything in a 2litre bottle add a squirt of washing up liquid and top up the bottle with water
This does work but not sure how long it is effective for.
1 mug of very strong tea (left to go cold)
15ml citronella oil
1 teaspoon washing up liquid
4 tablespoons cider vinegar
2 tablespoons methylated spirit
Add water to make 1 litre