Struggle with things (mucus, saliva?) in my throat when i sing

I am not sick and try not to sing in the morning. Hope you could help me figure out how to avoid or get rid of it

What helps me a bit is training ralaxed voacal fry through all the tonal spectrum and not harrumphing so much but do a very light and and almost or real silent harrumphing. Drinking some plain hot water in the evening and before going to bed also helps with the tendency to have too much phlegm build up (even though phlegm in itself is good, as this is what the mucous membranes produce, better than having dried up membranes). But I am still learning, so looking forward to the answer to this.

To gently clear the throat, try either lip trills or gentle vocal fry as Steffen suggested. 

I can't overstate how important hydration is! Plain water (either room temp or warm/hot), or water with lemon is my favorite for thinning out mucus and hydrating my throat. Singers also like hot tea with honey (especially Throat Coat tea). 

Another singer favorite is eating an apple before singing or recording to cut down on saliva/mucus - apparently green apples work well!

And last, avoid foods/drinks that cause excess mucus production or thicken your mucus. Dairy, sugar and spicy foods can all do that - so avoid them if they affect you adversely!