Mine always stay greasy and if I use soap, it's hard to get it all out. What do you all do?

First I use a small tip on a baby bottle brush dipped in diluted dishwashing liquid to push out all the extra frosting. Then I put all the tips in a tempered (to withstand the heat) measuring cup, place in my sink, and then pour BOILING water in to fill it up. If there is any leftover crisco/butter in the tips, you can see it liquify and come to the top. I pour out the first measuring of water, and then fill up with another cup of boiling water and let sit for a while and then rise and dry them.

I run them under hot what then put them in a coffee cup filed with water and microwave them for a while to get the rest of the grease off.

I bought a set of tips once that came with a brush to clean the tips. Try and find a super small brush with wire bristles.

An easy way to remove the 'plug' of icing left in tips is to take a toothpick and hold it tight against one side while turning the tip then just pull it out. The whole plug of icing will come out so you can throw it in the trash.
This helps clean the tip while keeping all that grease from going down the drain.
Now Soak the tips in very HOT, soapy water just until the water cools enough to touch, then rinse in hot water w/a bit of white vinegar in it.

I have an 8 cup large pyrex glass bowl with a handle. At the end of the day of decorating, I put all my tips and any other items that will fit in it and fill it with water. Microwave on hig for 10 minutes and they come clean. I also fill it with just plain water, microwave on high for 10 minutes then pour it into my plastic bowls - great way to get rid of that greasy feeling.

All these are good ways to clean tips, but I've found that whatever I do, the best thing is to put a little vinegar in the rinse water, like kakeladi said. That way you don't have to worry about any leftover grease in the tip the next time you want to pipe royal icing.

I throw mine in the dishwasher......... no muss, no fuss...... NO GREASY mess ........

I purchased a small sauce pan at a thrift store, just for boiling my tips. As I am cleaning up my mess, I cut the tips out of the disposable pastry bags and put them directly into the sauce pan. I cover the tips with water and bring to a boil. I dump them into a strainer and boil again. I do this again, only this time, I add a drop of dish washing liquid to the water. (This must be watched, it will boil over quickly) I dump through a strainer, and boil one more time with clear water and boil on last time. When they are done, I strain and pour them out on a clean dish towel. The heat from boiling makes them dry almost immediately. No grease!

I too soak the tips in very hot soapy water (usually Dawn dish soap) and wipe dry.

Metal tips in the microwave?

Great suggestions! Thank you! But isn't it a problem putting the metal tips in the microwave?

I push the icing out with my finger and toss them in a bowl of hot water then blast Hot water into the bowl with my pre-rinse sprayer.

I could never seem to get the grease off until i bought dawn. Some dish detergents are just not as good with grease. Now i fill a cup with hot tap water and dawn and toss in tips as i go. When i am ready to wash they clean right up. I do have one of the tiny tip brushes which does help especially with the tiny tips.

I have a friend who prefers to scrub her tips with the little brush, works for her. I put all my tips and couplers in a mesh baggie I bought, let it soak in hot water, and when I am ready to turn my dishwasher on, put the baggie on the top rack, clean tips every time! =) oh and I and a Dawn soap person!!! gets the grease!!

I'm with grama_j...I throw them in the dishwasher!