"I am trying to clean here."
Translation:Próbuję tutaj sprzątać.
Putting "tutaj" at the end gives a strong, often unusual emphasis on "here". Putting "tu" at the end sounds rather clumsy, but I guess it's not technically wrong. Better go with "tutaj", as it's more accented.
Anyway, added. It's maybe not the most natural option, but it's definitely a possibility.