Why does my toilet smell?!

Here is the kit I use:
Bosch Professional Combi Drill and Impact Driver with Two 18V 4.0 Ah Batteries amzn.to/2owE0mK
Bosch Professional 18V Cordless Circular Saw with 2 x 18 V 5.0 Ah Batteries
amzn.to/2IGTwDv
Bosch Professional 18V Cordless Multi-Cutter with 2 x 18 V 5 Ah Batteries and 16 Accessories
amzn.to/2AYPOAM
Bosch Professional 18V Cordless Jigsaw with 2 x 18 V 5.0 Ah Batteries
amzn.to/2IDgTxA
Bosch Professional GAS 35 M AFC Wet/Dry Extractor
amzn.to/2p5iPbj
Bosch Professional GMF 1600 CE Corded 240V Multi-Function Router
amzn.to/35komvb
Occidental Leather 5089 LG Seven Bag Framer Tool Belt
amzn.to/2OAjlc4
Occidental Leather 5355 Stronghold Comfort Package
amzn.to/2VuRF9U
Hikoki Nail Gun
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Bosch Table Saw & leg stand
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Damp Proof Membrane
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18mm Chipboard Flooring
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