Here is the brief regarding your question. For 100% ethanol-> 1 A decrease in ionic dissociation at lower dielectric constants in the presence of ethanol is considered to be the mechanism that underlies DNA precipitation.
And if I talk about the CTAB buffer that facilitates cell lysis and it prevents the secondary metabolites from interfering with DNA extraction and downstream procedures.
In conclusion, 98% ethanol would be 1st chance in which you might be get the results Charles Ologidi