Sorry another newbie question..... pasty butt

This site is a wealth of resource and help. Again i am brand new to chickens and have been all over this site. Most recently I have been on the thread for pasty butt. One of my little guys has it and she appears very weak and wobbly. I have been trying to wash her off to remove the blockage from the vent. Is there any better way to remove the blockage other than luke warm water. I have read a lot of post saying baby wipes, peroxide etc...

They are a week old and my temp in the brood box is 95 degrees near the lamp and they have a lot of room to wonder so they can regulate where they want to be to stay warm there are only 3 other chicks so ample room.

Also once I have it moist is it ok to pull it off or should I wait for the water to dissolve it away?

After it is removed there are different thoughts olive oil, Vaseline ...? Can I use any of these options without too much risk?

And finally diet. I am using the pro biotic stuff in the water and not in the food. Should I be putting it in the food? To boost digestion can I just place a small dish of plain yogurt in there? Someone mentioned sand as well?

I know there are a lot of questions here and I know that every situation is different. I just want to be sure I am giving this guy the best chance I can.

Any help or advice is appreciated....