New minikegs from Leyland with the partystar and co2.I tend to make a solution but don't think you have to with priming sugar.
Are you using your minikeg with a CO2 tap or just the standard pull/turn tap built into a minikeg ?
I had an Old speckled Hen minikeg from Morrisons (to re-use the keg more than anything). Obviously this used the pull/turn built in tap with the air intake bung in the top and after the first couple of decent pints I thought the rest of the keg was pretty flat.
Using a party star tap with CO2 allows you to keep topping the pressure up in the keg as you draw off the beer so the remaining beer stays fizzy.
Starting to wonder if it may have been the ale, it was my first ag brew and I got some of the mash grain in with the liquor and ended up filtering through a nylon strain bag into a second bucket before kegging. Have a bottle from the same batch in the fridge I'll open later to see if it has carbed ok.
Have a kit wheat beer ready to keg about a week now just need to find the time to do it so I'll be able to use sugar solution and vaseline on it :)