Me too, depending on what I'm trying to achieve.
A decent bait shouldn't need boosting as such imo. If the carp find a decent bait, they should eat it. If they don't, it's the wrong bait or the wrong time of year. For me, the purpose of glugging in hydros is simply to pull the carp in i.e. help them find your bait. To optimise this you want them as stacked full of those free aminos as possible - so they pump them out stronger, for longer. Mixing with water will just alleviate those food signals, and reduce the amount of time those signals are pumped out.
There is a place for water for certain applications (such as washing-in with glugs/saturating to prevent or slow down the taking on of silt for example), but for attraction you want it neat imo.