Excel 2010 :: Condensing VBA Code - Using Dynamic Variables?

I have some VBA that dumps various sheets data into an SQL Database.

Part of that requires me to sanitize all of the fields before they make it to the DB, (at least to prevent the code from breaking itself w/ errant ' characters.

right now my code is as follows

Code:
If InStr(aa, "'") > 0 Then
aa = Replace(aa, "'", "''")
End If
If InStr(bb, "'") > 0 Then
bb = Replace(bb, "'", "''")

[Code] ......

I was hoping to condense it to something like the following, however it is not working how I hoped / want it to. .. I had found somewhere out there that this Eval() function possibly could be used to 'reference' dynamic variables, however it does not appear to work at all anymore, and even then it may only have worked to 'read' and not 'write' to the variable. (Excel 2010, on Windows 7 64-bit).

Code:
itemsToSanitize = "aa,bb,cc,dd,ee,ff,gg,hh,ii,jj,kk,ll,mm,nn,oo,pp,qq,rr,ss,tt,uu,vv,ww,xx,yy,zz,aaa,bbb,ccc,ddd,eee,fff,ggg,hhh"
ITSArray = Split(itemsToSanitize, ",")

For Each thing In ITSArray
If InStr(Eval(thing), "'") > 0 Then
Eval(thing) = Replace(Eval(thing), "'", "''")
End If
Next thing