I tried all the methods available on internet be it methanol extraction or using Qiagen kit. I also tried incubating FTA card pieces in TE buffer overnight at 56 C but i got nothing. Each spot is suppose to have 125 uL sample loaded.
if all else fails you could try just cutting a small section of the paper and adding it direct to the pcr mixture using one of the polymerases that is tolerant of impurities. Some of the KAPA enzymes are very robust. Also you may not have much dna so you could try nested pcr after the first round pcr
I use a simple method to extract DNA from whatman FTA cards - I put small section of FTA in 0,5-1 ml of the lysis buffer (with guanidine tiocyanate) of NA isolation kit (e.g. Qiagene one), vortex 5 min, centrifuge 1 min (10 000 g) and take an aliquot of this buffer for direct NA isolation by this isolation kit. This buffer I take instead of the fresh lysis buffer in the isolation process and add water instead of a sample.