Path effects applying default

[RKNaidu]

Warm wishes to the Inkscape community,
"Whenever I drawn some thing with pen tool  two of the path effects applying by default 1. spiro spline and 2. power stroke". each time, I needed to remove the path effects manually, for every object drawn new, which makes my work tedious. I would like to know, how to disable these path effects, which became default for every object drawn newly. I got this problem, sometime, when I applied these effects to an object and finished. Then onwards these applying by default for every object drawn. 
Expecting a suitable solution.
Thank you..

[brynn]

I'm not sure if you might be describing 2 different issues, but I can explain both.

The main thing is after you enable the Pen/Bezier or Pencil/Freehand tool and before you start drawing, look at the control bar, which is the bar full of icons/buttons that is just above the top ruler.  For the Mode, choose Regular Bezier Path (not Spiro Spline). Also, in the Shapes dropdown menu, choose None.

There is another issue, that has more to do with style (color, opacity, stroke width, etc.), than with path effects.  It's completely a different thing that what you're describing....but still kind of similar.  This article/tutorial will explain everything:  Customize Your Inkscape Tools' Styles.  But feel free to ask questions, if you have any 

[RKNaidu]

Thank u so much Sir, for very quick response.
yes, I got solved the problem. I will tell, what has happened. Might be useful for someone else. For some work, I changed the mode to "spiro" and shape to " Triangle out" and forget about it. Even didn't check them and thinking something happened. I troubled a lot. Thank u so much.
Happy Inkscaping.

[brynn]

Don't worry.  You're not the only one who has this experience.  It's a question we see a lot