I have a workbook with VBA macros attached. It is now
huge in terms of rows and article 211888 suggests that
this is due to using the VBA editor and suggests deleting
unused sheets.

On the sheets I am using I have thousands of rows while I
am only using a few hundred. This means that a slight
nudge on the scroll bar putting me into outerspace. Is
this just something I have to live with? Maybe I will
have to develop a more delicate mouse action!