What to do if i do not have a thermomixer in teh lab?

What to do when there is no thermomixer in my lab for the MolYsis™-based kits?

MolYsis & Thermomixer
The MolYsis™ technology requires certain temperatures, 37°C, 56°C, and 70°C.

During the incubation, samples should be mixed well.
No Thermomixer? 
If no thermomixer with a shaking function is available, a heating block could be adjusted to the required temperatures, and the samples vortexed in between the incubation period.