realtime plot, y axes overlapping

Hi,

the first time when the plot/s is created is fine. When i change the y values and axes start to overlap. I've tried everything but i'm unable to clear the old axes.what do i have to do to make the code down below look nice and pretty? Thank you

function addaxis(hObject, eventdata, handles,varargin)

%ADDAXIS  adds an axis to the current plot

handles.output = hObject;

guidata(hObject, handles);...
    %  get current axis

axes(handles.Axes1)

set(gca,'Units','pixels');

cah=gca;

axesPosition = get(cah,'position');  %# y axes spacing, in pixels

yWidth = 30;  %# Range of x values 

x=evalin('base','t');

xLimit = [min(x) max(x)]; 

xOffset = -yWidth*diff(xLimit)/axesPosition(3); 

%# Create the axes: 

handles.Axes1 = axes('Units','pixels','Position',axesPosition,... 

      'Color','w','XColor','k','YColor','r','ylim',[-inf inf],...

      'XTick',[],'XLim',xLimit,'NextPlot','add');

handles.Axes1 = axes('Units','pixels','Position',axesPosition+yWidth.*[-1 0 1 0],...

          'Color','none','XColor','k','YColor','m',...
          'XLim',xLimit+[xOffset 0],'YLim',[-inf inf],...
          'XTick',[],'XTickLabel',[],'NextPlot','add');

handles.Axes1 = axes('Units','pixels','Position',axesPosition+yWidth.*[-2 0 2 0],...

      'Color','none','XColor','k','YColor','b',...
      'XLim',xLimit+[2*xOffset 0],'YLim',[-inf inf],...
      'XTick',[],'XTickLabel',[],'NextPlot','add'); 

%# Plot the data: 

plot(handles.Axes1,evalin('base','t'),evalin('base','y1'),'r'); 

plot(handles.Axes1,evalin('base','t'),evalin('base','y2'),'m'); 

plot(handles.Axes1,evalin('base','t'),evalin('base','y3'),'b');