Static increases over time as I record on Audacity

Hi. I’m trying to record an audiobook but recently I’ve experienced increased levels of static during recording. I’m using a Behringer microphone and a Behringer UMC22 Interface. Static was easy to remove on earlier recordings but now the level seems to increase after 3 or 4 minutes of recording and is difficult to remove without distorting my voice. It’s now got to the point where I’m having to record short sections of just 3 or 4 minutes at a time, edit that section and then record another 3 or 4 minutes. If I record longer sections, the static builds towards the end of the recording (even after I’ve used the noise reduction tool), rendering it unusable. Does anyone have any suggestions on how I might rectify this? Thanks in advance. Trevor

Please post a short sample of the “static” in WAV format. Just a few seconds is sufficient, but ensure it is in WAV format.
Attach the WAV file directly to your reply.