We can't live without warm clothes in the winter. Most of us like to wear down jackets.
If there is a spot on your down jacket, don't put it in the washing machine immediately. Your down jacket will not dry up quickly, so you can't put it on next time you go out.
You can easily wash greasy collar and sleeves without washing your clothes in a washing machine. Moreover, it isn't necessary to put the down jacket in the water.
By the way, try to wash warm clothes in a washing machine rarely because the fabric of down jackets is very sensitive and the clothes may loose their quality.
Surely, you can find special cleaning agents in the shops, for example, powders, sprays, pastas.
However, most of cleaning agents are expensive. One can buy a bad quality cleaner and loose money.
You can use other effective methods. Housewives have a lot of domestic means in the flat, such as anti grease powders for cleaning utensils.
You should remember that it is necessary to clear only the collar and sleeves. The whole down jacket shouldn't be put into the water.
Take two big spoons of anti grease powder. Poor 1 liter of water. Miss well until foam appears. By circular hand movements put the powder on the collar and sleeves with a small brush.
Afterwards wash in warm water by a clean sponge. A collar will be clean and smell pleasantly.