If you're using the valves, then yes, it's normal for condensation to occur on the valve slides. I find it odd that there's no water at the main tuning slide water key. Are you holding the horn in such a position that the water key is at the lowest point?
D
David Bjornstad
1923 Conn New Wonder 86I, Bach 6 1/2 AL
2018 Wessex EP100 Dolce, Denis Wick 4ABL
2013 Jinbao JBEP-1111L, Denis Wick 4AM
2015 Jinbao JBBR-1240, Denis Wick clone mouthpiece of unknown designation
Cullman (AL) Community Band (Euph Section Leader)
Brass Band of Huntsville (2nd Bari)