Ahhhh .. attack of the dreaded No-See-Ums!
From my own experience, replace the screens in your windows. Normal screening will not deter biting midges (no-see-ums)
. Caulking around the window frames will help, too. Then, spray the area with citronella every couple weeks. Also, I found a program that generates a high-pitched frequency that actually deters mosquitoes. The program is freeware (!) and developed by 'BKT Corporation.' You can find it on C/net, listed under 'anti-mosquito software.' I have similar software on my mobile phone, too
Posted by folks on another forum (dermatology), here are some solutions for the dilemma:
1. Effective repellent (no DEET): 2 cups witch hazel, one tablespoon citronella, one tablespoon white vinegar. Combine in a pump spray bottle. You can increase the potency by adding 900mg cleocin HCL (just dump in the capsule powder). Courtesy Diane Thaler
2. Effective repellent (no DEET): Pennyroyal oil applied to shoes, patches of clothing and hats. (Just don't consume it
.) If the smell is overpowering, add a few drops of citronella, lemon oil, lime oil, lavendar oil or peppermint oil. Courtesy of Daniel Siegel, M.D. MS
3. Vitamin B (Thiamine) orally. Usually we give 300 mg OD for adults, 150 mg for children OD and 75 mg for babies OD. It works by altering the scent of the individual to make them less attractive to mosquitoes. Courtesy Jonathan Yu, MD3.
4. Atopic children and adults may have exaggerated responses to mosquito bites. An excellent prophylaxis is Zyrtec (doesn't prevent the bites, but they don't have such severe reactions). For infants, try hydroxazine syrup. Courtesy Mark Naylor, M.D.
Plants that repel no-see-ums, mosquitoes and such: Insect repelling plants are citrosa, marigolds, rosemary, basil, mints, tansy, sage, rue and a ton of others. Courtesy of 'The Dirt Doctor' forum.