Originally Posted by
Time Zone
on repellent vs. headnets
100% DEET can be pretty damaging to synthetics, painted surfaces, etc. I once carried a little spray bottle of it, but it really damages plastics. Basically melts them. IIRC Deep Woods Off is about 35%, and that is even stronger than the "normal" version (which I haven't seen in awhile). That's sufficient and less likely to cause damage. Makes skin feel greasy/oily though. Don't handle contact lenses with any OFF on your hands. You should always wash them before anyway, but especially watch out for that stuff.
Picaridin is said to be equally effective, and does not have the melty-plastic effect. However, the bottle of Sawyer picaridin lotion I have says to apply no more than twice a day ... that can be really limiting. What's more, if you have applied some on your face and later sweat drips down, I found it leaves a numbing sensation when the sweat hits your lips. That's a bit unsettling. I find there's also a rubbery sensation/feel to where it is applied on skin.
As a result of these side-effects and limitations, I prefer to minimize the use of bug spray, and use a headnet when it's necessary around the head. Exposed arms and legs you may have to coat anyway, but if you can stand the extra warmth / reduced breeze under a net, I'd rather do that than deal with a sweat+repellent mixture getting into my eyes and mouth.