Most problems we have found with PLA Blend are the result of two issues
PLA Blend's recommended process temperature is 235-250C. This is higher than many basic PLA's on the market. Lower temperatures may result in poor printing results.
PLA Blend also requires rapid part cooling. Some models of 3D printers do not have a separate fan to cool the print area. If your 3D printer does not have one, we recommend using a small household fan.
The photo below demonstrates the importance of printing with a rapid cooling fan.
The stem on the right was printed using the cooling fan while the stem on the left printed without it.