I use these from Amazon. I work a very physical job and sweat a lot. These have held up for the life of the sensor.

https://www.amazon.com/ExpressionMed-Adhesive-Waterproof-Backing-Escapes/dp/B0BPTPYLNX?pd_rd_w=hn9mZ&content-id=amzn1.sym.deffa092-2e99-4e9f-b814-0d71c40b24af&pf_rd_p=deffa092-2e99-4e9f-b814-0d71c40b24af&pf_rd_r=0XCEY5Z9J803SR6G3NTD&pd_rd_wg=qU7rl&pd_rd_r=3f8fbd20-c0e6-4077-af45-87dd3793c0fb&pd_rd_i=B0BPTPYLNX&psc=1&ref_=pd_bap_d_grid_rp_0_1_t