Provided herein and methods and apparatuses for sequencing nucleic acids. For example, provided is an analytical detection apparatus, including (a) a stage configured to support a flow cell; (b) a detector configured to observe a detection channel of the flow cell when the flow cell is supported by the stage; (c) a plurality of fluid delivery channels, wherein each of the fluid delivery channels fluidically connects a reservoir to the detection channel of the flow cell; and (d) a first heater configured to heat the plurality of fluid delivery channels.