enlightened…..the fact of it being ‘bishul” is neither here nor there. If you have your lights on a timer, then when they come on,the lights/lamps are also doing “mav’ir” (or whichever of the different “melochos’ you suscribe to)
Instant coffee has no question of ‘bishul’ because it is ALREADY boiled and there is no “bishul achar bishul”.
squeak- actually, sprinkling water is not IN ITSELF a melocho (just think of sprinkling water on your floor, for example) it is the fact that the water is sprinkled ON GRASS that makes it a toldo of “zorea”.Hence, the “kli’ is not making a melocho,although the result is certainly a “melocho”
When you boil the water/coffee, it is intrinsically having your “kli’ make the melocho. a better analogy would be a timer for lights- as indicated by “wolfish” and there we clearly allow it. Stay tuned for mroe of this issue.There may be some teshuvos out there on this.