I did spray my backpack and my boots and my sleeping bag with permithrin-based repellent before heading off, but they must be immune to this. I asked my friend to contact the Albergue where i got this from. Gotta figure out how to kill the traveling ones now, thanks for all your advice. I don't think I'll go near another albergue after this anyway, I'd only act like I've ocd, checking every speck of dust on the bed etc. I feel disgusting when look at my skin, I've fingerprint sized hives in clusters and i think anyone who sees me must know what it is. Wearing long clothes to cover up in this heat is tough, especially because i love the sun on my skin. I'm really disappointed. Whinge over.