How do I descale it and clean the little milk frother thingy? It's a Krupps

i dont know much about espresso machines but i think you should inspect the machines back for screws to take out with a phillipshead driver. its the one with the + sign. take the tool and remove the screws. take the part(s) out that need cleaned and do so. replace everything in its proper place.

if that dont work, check for a lable with a phone and serial/make/model numbers on it. give the company a buzz and tell them the issues you have with the machine (i.e. no iunstruction booklet)

Bed Bath and Beyond sells a bottle of descaler (that you can also put in your iron to descale it). As for the milk frother thingy... I'd go to Krupps online and look for your model- you might be able to download a manual or something to that effect. If all else fails, check this site-
http://www.anothercoffee.co.uk/coffeeinfo/cleaning.aspx

Good luck!