Genomic DNA

What should be done if the column is clogged?
Why is the DNA recovery lower than expected?
Why doesn't the Eluted DNA perform well in downstream applications?
Why does the genomic DNA band appear smeared in agarose gel electrophoresis?
What is the key to successfully isolating genomic DNA of good yield and quality?
Why does the sample appear viscous after sample Lysis and not pass through the column easily, even when less than the suggested maximum sample amount is used?
When Buffy coat is used, the column tends to be clogged.