Crunchiness can be a lovely texture in a few very specific contexts. If you are taking out a singular potato chip from a bag that is full of them, you would ideally want this chip to be as crunchy as possible when you put it into your mouth and bite down on it. This makes the chip tastier and more satisfying, and there are plenty of other culinary situations wherein crunchiness and crispiness can be a very desirable kind of experience once all has been said and is now out of the way.
However, you might not like the idea of your carpet being crunchy, and if this happens after carpet cleaning you might start to wonder if you made some kind of a mistake that caused such a drastic textural shift. There is no need to panic if you notice that your carpet feels crispy instead of fluffy. The reason behind this is that there is only one potential root cause for such an occurrence, namely that you didn’t wash out your cleaning fluid from the carpet fibers for long enough and they therefor left behind a residue that mimics crunchiness in a rather unpleasant manner.
Steam cleaning your carpet will make crunchy textures more remote possibilities than might have been the case otherwise, so if you want to get rid of this feeling you should give your carpet a once over with a hot water extractor. This can make it so that the crunch causing particles will get dissolved, and the suction in the machine will scoop them up as well. Try to let your carpet dry for long enough too, since this is also a factor here.