Underpants and socks I wear once and then I wash them. Only exception is socks I wear for about five minutes if I want to put some shoes on or something. Tops I wash after once day unless I wear them after school (I wear uniform during the day) because I'm not wearing them for very long and so I leave them two days, unless I stay late because that's even less so three.
Trousers I wash totally at random. If I like the pair, I wait a while...if I don't, then maybe two days.
Bras I wash when I start wearing clothes that I can wear another colour with.
I wear my school trousers and jumper for a full week and then wash them.
I don't iron anything unless it's for a formal occasion or it's really creased.
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One drop is lonely
Two drops okay
Three drops can make a spray
Four drops get carried away